Hammerfall® DSP System Multiface II - RME

User's Guide
Hammerfall ® DSP System
24 Bit / 96 kHz
Multiface II
Simply THE professional multitrack recording system!
TotalMix
SyncAlign ZLM SyncCheck
Analog and Digital Audio I/O System
PCI, CardBus, PCI Express and ExpressCard Interface
8 + 8 + 2 Channels Analog / ADAT / SPDIF Interface
Hi-Power Hi-End Headphone Output
24 Bit / 96 kHz

2
General
1 Introduction ...............................................................6
2 Package Contents .....................................................6
3 System Requirements ..............................................6
4 Brief Description and Characteristics.....................7
5 First Usage – Quick Start
5.1 Connectors and Front Panel ..................................7
5.2 Quick Start .............................................................8
Installation and Operation - Windows
6 Hardware Installation
6.1 PCI / PCIe Card .......................................................10
6.2 CardBus / ExpressCard ...........................................10
6.3 Notes on Power Supply ...........................................10
7 Driver and Firmware
7.1 Driver Installation .....................................................11
7.2 Driver Update...........................................................11
7.3 De-installing the Drivers...........................................11
7.4 Firmware Update .....................................................12
8 Configuring the Multiface II
8.1 Settings Dialog .........................................................13
8.2 Clock Modes – Synchronization...............................15
9 Operation and Usage
9.1 Playback...................................................................16
9.2 DVD Playback (AC-3 / DTS) ....................................17
9.3 Notes on WDM.........................................................18
9.4 Channel Count under WDM.....................................19
9.5 Multi-client Operation ...............................................19
9.6 Analog Recording.....................................................20
9.7 Digital Recording......................................................20
10 Operation under ASIO
10.1 General ................................................................21
10.2 Channel Count under ASIO .................................21
10.3 Known Problems..................................................22
11 Using more than one Hammerfall DSP .................22
12 DIGICheck Windows ...............................................23
13 Hotline – Troubleshooting......................................24
User's Guide HDSP System Multiface II © RME

Driver Installation and Operation - Mac OS X
14 Hardware Installation
14.1 PCIe Card ............................................................. 26
14.2 ExpressCard ......................................................... 26
14.3 Notes on Power Supply ........................................ 26
15 Driver and Firmware
15.1 Driver Installation ................................................. 27
15.2 Driver Update....................................................... 27
15.3 Firmware Update ................................................. 27
16 Configuring the Multiface II
16.1 Settings Dialog..................................................... 28
16.2 Clock Modes – Synchronization .......................... 30
17 Mac OS X FAQ
17.1 Round about Driver Installation ........................... 32
17.2 MIDI doesn't work ................................................ 32
17.3 Supported Sample Rates..................................... 32
17.4 Repairing Disk Permissions................................. 32
17.5 Channel Count under Core Audio ....................... 33
17.6 Various Information.............................................. 33
18 Using more than one Hammerfall DSP ................. 33
19 DIGICheck Mac........................................................ 34
20 Hotline – Troubleshooting ..................................... 34
Disconnect Mode, Connections and TotalMix
21 Disconnect Mode .................................................... 36
22 Analog Connections
22.1 Line Inputs ........................................................... 36
22.2 Line Outputs......................................................... 37
22.3 Phones................................................................. 77
23 Digital Connections
23.1 ADAT ................................................................... 38
23.2 SPDIF .................................................................. 38
23.3 Word Clock .......................................................... 39
23.4 MIDI .....................................................................39
24 Word Clock
24.1 Technical Description and Background............... 40
24.2 Cables and Termination....................................... 40
24.3 General Operation ............................................... 41
25 TotalMix: Routing and Monitoring
25.1 Overview .............................................................. 44
25.2 The User Interface ............................................... 46
25.3 Elements of a Channel ........................................47
25.4 Tour de TotalMix.................................................. 47
25.5 Submix View ........................................................ 49
25.6 Mute and Solo...................................................... 49
25.7 Quick Access Panel............................................. 50
25.8 Presets................................................................. 50
25.9 Monitor Panel....................................................... 52
25.10 Preferences.......................................................... 53
25.11 Editing the Names ............................................... 53
25.12 Hotkeys ................................................................ 54
25.13 Menu Options....................................................... 55
25.14 Menu Fader Groups............................................. 55
25.15 Level Meter .......................................................... 56
User's Guide HDSP System Multiface II © RME 3

26 TotalMix: The Matrix
26.1 Overview ..............................................................57
26.2 Elements of the Matrix View ................................57
26.3 Usage...................................................................57
26.4 Advantages of the Matrix .....................................58
27 TotalMix Super-Features
27.1 ASIO Direct Monitoring (Windows only) ..............58
27.2 Selection and Group based Operation ................59
27.3 Copy Routings to other Channels........................59
27.4 Delete Routings....................................................59
27.5 Recording a Subgroup (Loopback)......................60
27.6 Using external Effects Devices ............................61
27.7 MS Processing .....................................................62
28 TotalMix MIDI Remote Control
28.1 Overview ..............................................................63
28.2 Mapping ...............................................................63
28.3 Setup....................................................................64
28.4 Operation .............................................................64
28.5 Simple MIDI Control.............................................65
28.6 Loopback Detection .............................................66
4
Technical Reference
29 Technical Specifications
29.1 Analog ..................................................................69
29.2 Digital ...................................................................69
29.3 Digital Inputs ........................................................70
29.4 Digital Outputs......................................................70
29.5 MIDI......................................................................70
29.6 General ................................................................71
30 Technical Background
30.1 Lock and SyncCheck ...........................................71
30.2 Latency and Monitoring........................................72
30.3 DS – Double Speed .............................................73
30.4 AES/EBU – SPDIF ...............................................74
31 Diagrams
31.1 Block Diagram Multiface II ...................................75
31.2 Connector Pinouts................................................76
Miscellaneous
32 Accessories .............................................................78
33 Warranty...................................................................79
34 Appendix ..................................................................79
35 Declaration of Conformity......................................80
User's Guide HDSP System Multiface II © RME

User's Guide
Multiface II
General
User's Guide HDSP System Multiface II © RME 5

1. Introduction
Thank you for choosing the RME Hammerfall DSP system. This unique audio system is capable
of transferring analog and digital audio data directly to a computer from practically any device.
The latest Plug and Play technology guarantees a simple installation, even for the inexperienced
user. The numerous unique features and well thought-out configuration dialog puts the
Hammerfall DSP at the very top of the range of computer-based audio interfaces.
The package contains drivers for Windows (XP, Vista, 7, 8) and Mac OS X x86 (Intel).
Our high-performance philosophy guarantees maximum system performance by executing as
many functions as possible not in the driver (i.e. the CPU), but within the audio hardware.
2. Package Contents
Please check your Hammerfall DSP package contains each of the following:
PCI / PCIe Interface
• PCI card HDSP (rev 1.9 or up) or PCI Express Card (any revision)
• Quick Info guide
• RME Driver CD
• Cable IEEE1394, 4.5 m (15 ft)
CardBus / ExpressCard Interface
• CardBus or ExpressCard
• Quick Info guide
• RME Driver CD
• Cable IEEE1394, 4 m (13 ft)
• 12 V car cable
• Battery cable
• Power supply 12 V / 1.25 A and power cord
Multiface II
• I/O-box Multiface II
• Quick Info guide
• RME Driver CD
• 1 optical cable (TOSLINK), 2 m (6.6 ft)
3. System Requirements
• Windows XP SP2 or up, Intel Mac OS X (10.5 or up)
• PCI Interface: a free PCI rev. 2.1 Busmaster slot
• PCI Express Interface: a free PCI Express slot, 1 Lane, version 1.1
• CardBus Interface: a free PCMCIA slot type II, CardBus-compatible
• Express Card interface: a free ExpressCard/34 slot
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User's Guide HDSP System Multiface II © RME

4. Brief Description and Characteristics
• All settings can be changed in real-time
• Analog, ADAT and SPDIF I/Os can be used simultaneously
• Buffer sizes/latencies from 32 up to 4096 samples selectable
• 4 channels 96 kHz/24 bit record/playback via ADAT optical (S/MUX)
• Automatic and intelligent master/slave clock control
• Unsurpassed Bitclock PLL (audio synchronization) in ADAT mode
• Word clock input and output
• TotalMix for latency-free submixes and perfect ASIO Direct Monitoring
• SyncAlign guarantees sample aligned and never swapping channels
• SyncCheck tests and reports the synchronization status of input signals
• 1 x MIDI I/O, 16 channels high-speed MIDI
• Separate analog Line/hi-power headphone output for independent submix
• DIGICheck DSP: Level meter in hardware, peak- and RMS calculation
• TotalMix: 720 channel mixer with 40 bit internal resolution
5. First Usage – Quick Start
5.1 Connectors and Front Panel
The front of the Multiface II features a MIDI input and output, a stereo headphone output with
volume control, two switches to select the analog reference level, and several status LEDs.
MIDI IN and OUT are the MIDI input and output, realized as 5-pin DIN jacks.
The LEDs MIDI IN and OUT indicate sent or received data for the MIDI ports.
The Digital State LEDs (WC, SPDIF, ADAT) indicate a valid input signal separately for each
digital input. Additionally, RME's exclusive SyncCheck indicates if one of these inputs is locked,
but not synchronous to the others, in which case the LED will flash. See also chapter 8.2 / 16.2,
Clock Modes - Synchronization.
The red HOST LED lights up when the power supply or the computer is switched on, indicating
the presence of operating voltage. At the same time it works as Error LED, in case the I/O-box
has not been initialised, or the connection to the interface has been interrupted (Error, cable not
connected etc.) – it then flashes. After the firmware had been loaded the LED turns off, thus
signalling a proper operation.
ANALOG LEVEL has two switches with three positions each, to select the reference level of
the eight analog inputs and outputs on the rear.
Phones is a low impedance line output of highest quality, which can produce a sufficient volume
undistorted even when used with headphones.
The volume of the phones output is adjusted with the knob VOL.
User's Guide HDSP System Multiface II © RME 7

The rear panel of the Multiface II has eight analog inputs and outputs, the Power socket (only
necessary with CardBus/ExpressCard operation), Word Clock input and output, and both digital
inputs and outputs ADAT and SPDIF.
ADAT I/O (TOSLINK): Can also be used as optical SPDIF input and output, if set up accordingly
in the Settings dialog. The Settings dialog is started by clicking on the hammer symbol in
the Task Bar's system tray.
SPDIF I/O coaxial (RCA): Fully AES/EBU compatible by transformer-coupling and level adjustment.
The Multiface accepts the commonly used digital audio formats, SPDIF as well as
AES/EBU.
Word Clock I/O (BNC). The word clock input is not terminated.
The hook serves as strain relief. Originally only thought of as power cable retention (feed cable
through it, or knot it around the hook), it's big enough to also handle some other cables of the
Multiface. The hook is mounted using a thread, therefore can be turned and even completely
removed.
5.2 Quick Start
After the driver installation (see chapter 7 / 15) connect the TRS-jacks with the analog signal
source. The input sensitivity can be changed with the switch ANALOG LEVEL INPUTS, assuring
the highest signal to noise ratio will be achieved. Try to achieve an optimum input level by
adjusting the source itself. Raise the source’s output level until the peak level meters in TotalMix
reach about –3 dB.
The analog line inputs of the Multiface can be used with +4 dBu and -10 dBV signals. The electronic
input stage can handle balanced (TRS jacks) and unbalanced (TS jacks) input signals
correctly.
The Multiface's digital outputs provide SPDIF (AES/EBU compatible) and ADAT optical signals
at the corresponding ports.
On the analog playback side (the DA side), the switch ANALOG LEVEL OUTPUTS performs a
coarse adjustment of the analog output level of all rear analog outputs.
An additional stereo output is available on the front. The output level can be set using the VOL
pot. This output is a very low impedance type, which can also be used to connect headphones.
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User's Guide HDSP System Multiface II © RME

User's Guide
Multiface II
Driver Installation and Operation - Windows
User's Guide HDSP System Multiface II © RME 9

6. Hardware Installation
6.1 PCI / PCIe Card
10
Before installing the card, please make sure the computer is switched off and the power
cable is disconnected from the mains supply. Inserting or removing the card while the computer
is in operation can cause irreparable damage to both motherboard and card!
1. Disconnect the power cord and all other cables from the computer.
2. Remove the computer's housing. Further information on how to do this can be obtained from
your computer’s instruction manual.
3. Important: Before removing the card from its protective bag, discharge any static in your
body by touching the metal chassis of the computer.
4. Insert the PCI card firmly into a free PCI slot, press and fasten the screw. OR: Insert the PCI
Express card firmly into a free PCI Express slot, press and fasten the screw.
5. Replace the computer's housing.
6. Reconnect all cables including the power cord.
7. Connect PCI card and Multiface using the supplied cable (IEEE1394). This is a standard
FireWire cable (6-pin).
6.2 CardBus / ExpressCard
Before inserting the CardBus or ExpressCard make sure the complete HDSP system is ready
for operation!
1. Connect the CardBus / ExpressCard with the Multiface using the supplied cable.
2. Insert the CardBus / ExpressCard into the appropriate slot.
3. Plug the power jack of the supplied switching power supply into the connector labelled AUX,
on the rear of the Multiface.
4. Connect power cord to power supply (if detachable), then plug the power supply into an AC
outlet. The green LED of the power supply and the red LED of the Multiface will light up.
5. Switch on the notebook and boot the operating system.
6.3 Notes on Power Supply
• The CardBus / ExpressCard do not deliver power to the Multiface. Therefore a hi-tech
switching power supply is included.
• The PCI / PCIe card operates as power supply for the Multiface via the FireWire cable. An
external power supply is not required.
The Multiface II draws a high startup current of more than 2 A during initialisation. Current at 12
Volt operating voltage: unloaded 720 mA (8.6 Watts), loaded 1 A (12 Watts). Supply voltage
range DC 8 V – 28 V, AC 8 V – 20 V.
The Multiface II has a higher power consumption than the original Multiface. Therefore the
Multiface II will only work with a HDSP PCI card revision 1.9 or higher!
While the Multiface causes a load of about 9 Watts to the PCI card, the Multiface II will cause a
load of about 12 Watts. The old HDSP PCI cards are not designed for such a load. The voltage
regulator found on the PCI card will switch off after a short time due to overheating. The HDSP
PCI revision 1.9 uses a more powerful regulator.
All PCI Express cards work with the Multiface II.
User's Guide HDSP System Multiface II © RME

7. Driver and Firmware
7.1 Driver Installation
After the interface has been installed correctly (see 6. Hardware Installation), and the computer
has been switched on, Windows will recognize the new hardware component and start its
‘Hardware Wizard’. Insert the RME Driver CD into your CD-ROM drive, and follow further instructions
which appear on your computer screen. The driver files are located in the directory
\WDM on the RME Driver CD.
Windows now installs the driver of the HDSP system and registers it as a new
audio device in the system. After a reboot, the symbols of TotalMix and
Settings dialog will appear in the task bar.
In case the Hardware Wizard does not show up automatically after installation of the card, do
not attempt to install the drivers manually! An installation of drivers for non-recognized hardware
will cause a blue screen when booting Windows!
In Windows 7 Microsoft removed the automatic start of the Driver Software Update dialog. Therefore
this dialog has to be started manually after the failed driver installation. Hit the Windows
key, type 'Device Manager', start the Device Manager by selecting it from the list and hit Enter.
The device is shown with a yellow warning symbol. Usually it is already found in the correct
category, Sound, Video and Game Controller (Plug & Play detects a multimedia device). Right
click on the device and select 'Update Driver Software' from the context menu.
The dialog Update Driver Software appears. Now follow the instructions given below.
7.2 Driver Update
When facing problems with the automatic driver update, the user-driven way of driver installation
will work.
Under >Control Panel /System /Device Manager /Sound, Video and Game Controllers /RME
Hammerfall DSP /Properties /Driver< you'll find the 'Update Driver' button.
XP: Select 'Install from a list or specific location (advanced)', click 'Next', select 'Don't
search I will choose the driver to install', click 'Next', then 'Have Disk'. Now point to the
driver update's directory.
Vista/7: Select 'Browse my computer for driver software', then 'Let me pick from a list of
device drivers from my computer', then 'Have Disk'. Now point to the driver update's directory.
This method also allows for the installation of older drivers than the currently installed ones.
7.3 De-installing the Drivers
A de-installation of the HDSP driver files is not necessary – and not supported by Windows
anyway. Thanks to full Plug & Play support, the driver files will not be loaded after the hardware
has been removed. If desired these files can then be deleted manually.
Unfortunately Windows Plug & Play methods do not cover the additional autorun entries of TotalMix,
the Settings dialog, and the registration of the ASIO driver. Those entries can be removed
from the registry through a software de-installation request. This request can be found
(like all de-installation entries) in Control Panel, Software. Click on the entry 'RME Hammerfall
DSP (WDM)'.
User's Guide HDSP System Multiface II © RME 11

7.4 Firmware Update
The Flash Update Tool updates HDSP PCI, PCIe, CardBus and ExpressCard to the latest version.
It requires an already installed driver.
Start the program hdsp_wdm_fut.exe (for all HDSP cards) or pcie_fut.exe (for all HDSPe
cards). The Flash Update Tool displays the current revision of the HDSP interface, and whether
it needs an update. If so, then please manually select if a PCI card (desktop computer) or a
CardBus card (laptop) shall be flashed. Next simply press the 'Update' button. A progress bar
will indicate when the flash process is finished. The bar moves slowly first (program), then faster
(verify).
If more than one interface card is installed, all cards can be flashed by changing to the next tab
and repeating the process.
After the update the card needs to be reset. This is done by powering down and shutting off the
PC. A warm boot is not enough!
Note that the firmware update is done on the interface card, not on the Multiface. The firmware
of the Multiface is part of the driver, invisible, and loaded automatically during boot.
PCI card revision 1.8 or up (black PCB), CardBus with 6-pin FireWire connector, all PCIe
and ExpressCards
When the update unexpectedly fails (status: failure), the card's Safety BIOS will be used from
the next cold boot on (Secure BIOS Technology). Therefore the card stays fully functional. The
flash process should then be tried again on a different computer.
All other PCI cards and CardBus with 15-pin flat connector
When the update fails (status: failure) the flash process should be repeated several times, until
no error message occurs anymore. If the failure message is displayed nonetheless, the interface
will most probably no longer work when the computer is switched off and on again. The
interface then has to be re-programmed at the factory. We have invested a lot of work to prevent
the system from getting in this state. If it happens despite our efforts, the best advice we
can give is to not switch off the computer! As long as it is not switched off the old programming
of the PCI/CardBus interface will stay active, and you can continue to work with the system
using the old drivers
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User's Guide HDSP System Multiface II © RME

8. Configuring the Multiface II
8.1 Settings Dialog
Configuration of the HDSP system Multiface is done via its own settings dialog. The panel 'Settings'
can be opened:
• by clicking on the hammer symbol in the Task Bar's notification area
The mixer of the Hammerfall DSP System (TotalMix) can be opened:
• by clicking on the mixer icon in the Task Bar's notification area
The hardware of the HDSP system offers a number of helpful, well thought-of practical functions
and options which affect how the card operates - it can be configured to suit many different
requirements. The following is available in the 'Settings' dialog:
• Latency
• Current sample rate
• Synchronization behaviour
• Configuration of digital I/Os
• State of input and output
Any changes made in the Settings
dialog are applied immediately -
confirmation (e.g. by clicking on OK
or exiting the dialog) is not required.
However, settings should not be
changed during playback or record if
it can be avoided, as this can cause
unwanted noises.
Also, please note that even in 'Stop'
mode, several programs keep the
recording and playback devices
open, which means that any new
settings might not be applied immediately.
The tab About includes information
about the current driver and firmware
version of the Multiface II.
Buffer Size
The setting Buffer Size determines the latency between incoming and outgoing ASIO and WDM
data, as well as affecting system stability (see chapter 10.1).
Clock Mode
Sample Rate
Sets the currently used sample rate. Offers a central and comfortable way of configuring the
sample rate of all WDM devices to the same value, as since Vista the audio software is no
longer allowed to set the sample rate. However, an ASIO program can still set the sample rate
by itself.
During record/playback the selection is greyed out, so no change is possible.
User's Guide HDSP System Multiface II © RME 13

Clock Source
The unit can be configured to use its own clock (Internal = Master), or one of the input signals
(Word, SPDIF, ADAT). If the selected source isn't available (Input Status No Lock), the unit will
change to the next available one (this behaviour is called AutoSync). If none is available then
the internal clock is used. The current clock source is displayed as Current.
SPDIF In
Defines the input for the SPDIF signal. 'Optical' relates to the optical TOSLINK input, 'Coaxial' to
the RCA socket. TMS activates the transmission of Channel Status data and Track Marker information.
In case these information are not required the feature should be turned off. The Sample
Rate of the incoming SPDIF signal is displayed as well.
SPDIF Out
The SPDIF output signal is constantly available at the phono plug. After selecting 'Optical' it is
also routed to the optical TOSLINK output. For further details about the setting ‘Professional’,
‘Emphasis’ and ‘Non-Audio’ please refer to chapter 23.2.
SyncCheck
Indicates whether there is a valid signal (Lock, No Lock) for each input (ADAT, SPDIF, Word
Clock), or if there is a valid and synchronous signal (Sync).
Word Clock
The word clock output signal usually equals the current sample rate. Selecting Single Speed
causes the output signal to always stay within the range of 32 kHz to 48 kHz. So at 96 kHz
sample rate, the output word clock is 48 kHz.
I/O Box
Disconnect interrupts the communication between I/O-box and card. In case the Multiface has
been configured using the Settings dialog and TotalMix, Disconnect allows to use it Stand-
Alone (without a connected computer), after a power supply has been attached.
I/O Box State
This field displays the current state of the I/O-box.
Error: I/O-box not connected or missing power
Detected: The interface has found an I/O-box and tries to load the firmware
Connected: Communication between interface and I/O-box operates correctly
Disconnected: Communication between interface and I/O-box has been interrupted, I/O-box
continues operation
Time Code
Time Code from the input ADAT Sync. Not available for the Multiface II.
The tab About includes two more, global options:
Lock registry
Default: off. Checking this option brings up a dialog to enter a password. Changes in the Settings
dialog are no longer written to the registry. As the settings are always loaded from the
registry when starting the computer, this method provides an easy way to define an initial state
of the HDSPe AES.
Optimize Multi-client Mixing
Default: on. Unchecking this option might solve compatibility problems in seldom cases, but will
also introduce short noise burst when multi-client playback starts.
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User's Guide HDSP System Multiface II © RME

8.2 Clock Modes - Synchronization
In the digital world, all devices must be either Master (clock source) or Slave (clock receiver).
Whenever several devices are linked within a system, there must always be a single master
clock.
A digital system can only have one master! If the HDSP’s clock mode is set to 'Master', all
other devices must be set to ‘Slave’.
The HDSP system utilizes a very user-friendly, intelligent clock control, called AutoSync. In
AutoSync mode, the system constantly scans the digital input for a valid signal. If any valid signal
is found, the Multiface switches from the internal quartz (Clock Mode – Current Internal) to a
clock extracted from the input signal (Clock Mode – Current ADAT, SPDIF or Word). The difference
to a usual slave mode is that whenever the clock reference fails, the system will automatically
use its internal clock and operate in clock mode Master.
AutoSync guarantees that record and record-while-play will always work correctly. In certain
cases however, e.g. when the inputs and outputs of a DAT machine are connected directly to
the Hammerfall DSP, AutoSync may cause feedback in the digital carrier, so synchronization
breaks down. To solve this problem switch the HDSP clock mode to Master (Clock Mode - Internal).
The HDSP ADAT and SPDIF input operate simultaneously. Because there is no input selector
however, the HDSP has to be told which of the signals is the sync reference (a digital device
can only be clocked from a single source). By selecting a Clock Source a preferred input is defined.
As long as the unit sees a valid signal there, this input will be designated as the sync
source.
In some situations changing the clock mode can not be avoided. Example: An ADAT recorder is
connected to the ADAT input (ADAT immediately becomes the AutoSync source) and a CD
player is connected to the SPDIF input. Try recording a few samples from the CD and you will
be disappointed - few CD players can be synchronized. The samples will inevitably be corrupted,
because the signal from the CD player is read with the clock from the ADAT. In this
case the Clock Source should be temporarily set to SPDIF.
RME’s exclusive SyncCheck technology enables an easy to use check and display of the current
clock status. SyncCheck indicates whether there is a valid signal (Lock, No Lock) for each
input (Word Clock, ADAT, SPDIF), or if there is a valid and synchronous signal (Sync). In the
field Clock Mode the clock reference is shown. See chapter 30.1.
In practice, SyncCheck provides the user with an easy way of checking whether all digital devices
connected to the system are properly configured. With SyncCheck, finally anyone can
master this common source of error, previously one of the most complex issues in the digital
studio world.
User's Guide HDSP System Multiface II © RME 15

9. Operation and Usage
9.1 Playback
The HDSP system can play back audio data in supported formats only (sample rate, bit resolution).
Otherwise an error message appears (for example at 22 kHz and 8 bit).
In the audio application being used, HDSP must be selected as output device. This can often be
found in the Options, Preferences or Settings menus under Playback Device, Audio Devices,
Audio etc.
We strongly recommend switching off all system sounds (via >Control Panel /SoundsControl
Panel /Multimedia /Audio< or >Control Panel /Sound /Playback

9.2 DVD-Playback (AC-3/DTS)
AC-3 / DTS
When using popular DVD software player like WinDVD and PowerDVD, their audio data stream
can be sent to any AC-3/DTS capable receiver using the HDSP SPDIF output. For this to work,
the WDM SPDIF device has to be selected in >Control Panel/ Sounds and Multimedia/ Audio<
or >Control Panel/ Sound/PlaybackControl Panel/ Sounds and Multimedia/ AudioVolume/ Speaker Settings/ Advanced< has to
be changed from Stereo to 5.1 Surround.
Vista/7: >Control Panel/ Sound/ Playback < as ‘Standard’. Additionally the loudspeaker setup,
found under >Configuration

9.3 Notes on WDM
The driver offers a WDM streaming device per stereo pair, like HDSP Multiface (1+2). WDM
streaming is Microsoft's current driver and audio system, directly embedded into the operating
system. WDM streaming is hardly usable for professional music purposes, as all data is processed
by the so called Kernel Mixer, causing a latency of at least 30 ms. Additionally, WDM can
perform sample rate conversions unnoticed, cause offsets between record and playback data,
block channels unintentionally and much more.
Several programs do not offer any direct device selection. Instead they use the playback device
selected in Windows under
XP:
Vista/7:
The program Sonar from Cakewalk is unique in many ways. Sonar uses the so called WDM
Kernel Streaming, bypassing the WDM mixer, thus achieves a similar performance to ASIO.
Because of the driver's multichannel streaming ability Sonar not only finds the stereo device
mentioned above, but also the 8-channel interleaved devices, and adds the channel number at
the end:
HDSP Multiface (1+2) is the first stereo device
HDSP Multiface (3+4) is the next stereo device
HDSP Multiface (1+2) 3/4 are the channels 3/4 of the first 8-channel interleaved device.
It is not recommended to use these special interleaved devices. Also note that it is not possible
to use one stereo channel twice (the basic and the interleaved device).
Multi-Channel using WDM
The WDM Streaming device Loudspeaker (Analog 1+2) of the RME driver can operate as usual
stereo device, or as up to 8-channel device.
An 8-channel playback using the Windows Media Player requires the speaker setup 7.1 Surround.
Configure as follows:
XP: >Control Panel /Sounds and Multimedia /Audio /Volume /Speaker Settings /Advanced <
Vista/7: >Control Panel /Sound /Playback /Loudspeaker /Configure <
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User's Guide HDSP System Multiface II © RME

9.4 Channel Count under WDM
The HDSP system’s ADAT optical ports allow to record sample rates of up to 96 kHz using a
standard ADAT recorder. For this to work single-channel data is spread to two ADAT channels
using the Sample Multiplexing technique. This reduces the number of available ADAT channels
from 8 to 4.
When the HDSP system changes into Double Speed (88.2/96 kHz) mode the ADAT devices 5/6
and 7/8 are still found in the list, but no longer functional.
WDM Stereo device Double Speed
Analog (1+2) Analog (1+2)
Analog (3+4) Analog (3+4)
Analog (5+6) Analog (5+6)
Analog (7+8) Analog (7+8)
SPDIF SPDIF
ADAT 1 (1+2) ADAT 1 (1+2)
ADAT 1 (3+4) ADAT 1 (3+4)
ADAT 1 (5+6) ADAT 1 (5+6)
ADAT 1 (7+8) ADAT 1 (7+8)
Note: Under Vista/7 the analog outputs 1/2 show up as Loudspeaker.
9.5 Multi-client Operation
RME audio interfaces support multi-client operation. Several programs can be used at the same
time. The formats ASIO and WDM can even be used on the same playback channels simultaneously.
As WDM uses a real-time sample rate conversion (ASIO does not), all active ASIO
software has to use the same sample rate.
However, a better overview is maintained by using the channels exclusively. This is no limitation
at all, because TotalMix allows for any output routing, and therefore a playback of multiple software
on the same hardware outputs.
Inputs can be used from an unlimited number of WDM and ASIO software at the same time, as
the driver simply sends the data to all applications simultaneously.
RME's sophisticated tool DIGICheck is an exception to this rule. It operates like an ASIO host,
using a special technique to access playback channels directly. Therefore DIGICheck is able to
analyse and display playback data from any software, no matter which format it uses.
User's Guide HDSP System Multiface II © RME 19

9.6 Analog Recording
For recordings via the analog inputs the corresponding record device has to be chosen (HDSP
Analog (x+x)).
The input sensitivity of the analog inputs can be adjusted using the front panel switch ANALOG
LEVEL INPUTS to meet the most often used studio levels, see chapter 22.1.
It often makes sense to monitor the input signal or send it directly to the output. This can be
done at zero latency using TotalMix (see chapter 25).
An automated control of real-time monitoring can be achieved by Steinberg’s ASIO protocol
with RME’s ASIO drivers and all ASIO 2.0 compatible programs. When 'ASIO Direct Monitoring'
has been switched on, the input signal is routed in real-time to the output whenever a recording
is started (punch-in).
9.7 Digital Recording
Unlike analog soundcards which produce empty wave files (or noise) when no input signal is
present, digital I/O cards always need a valid input signal to start recording.
Taking this into account, RME added a
comprehensive I/O signal status display to
the HDSP system, showing sample
frequency, lock and sync status for every
input, and several status LEDs directly at
the unit.
The sample frequency shown in the fields
Clock Mode and Input Status is useful as a
quick display of the current configuration of
the unit and the connected external
equipment. If no sample frequency is
recognized, it will read ‘No Lock’.
This way, configuring any suitable audio application for digital recording is simple. After selecting
the required input, Hammerfall DSP displays the current sample frequency. This parameter
can then be changed in the application’s audio attributes (or similar) dialog.
20
User's Guide HDSP System Multiface II © RME

10. Operation under ASIO
10.1 General
Start the ASIO software and select ASIO Hammerfall DSP as the audio I/O device.
The Multiface supports ASIO Direct Monitoring (ADM).
The Multiface’s MIDI I/O can be used with both MME MIDI and DirectMusic MIDI.
10.2 Channel Count under ASIO
At a sample rate of 88.2 or 96 kHz, the ADAT optical input and output operate in S/MUX mode,
so the number of available channels per port is reduced from 8 to 4.
Note: When changing the sample rate range between Single and Double Speed the number of
channels presented from the ASIO driver will change too. This may require a reset of the I/O list
in the audio software.
Single Speed Double Speed
Analog 1 to 8 Analog 1 to 8
SPDIF L / R SPDIF L / R
ADAT 1 to 8 ADAT 1 to 4
User's Guide HDSP System Multiface II © RME 21

10.3 Known Problems
If a computer does not provide sufficient CPU-power and/or sufficient PCI-bus transfer rates,
then drop outs, crackling and noise will appear. Raising the buffer size in the Settings dialog of
the HDSP system helps in most cases. It is also recommended to deactivate all PlugIns to verify
that these are not the reason for such effects.
Another common source of trouble is incorrect synchronization. ASIO does not support asynchronous
operation, which means that the input and output signals not only have to use the
same sample frequency, but also have to be in sync. All devices connected to the Multiface
must be properly configured for Full Duplex operation. As long as SyncCheck (in the Settings
dialog) only displays Lock instead of Sync, the devices have not been set up properly!
The same applies when using more than one HDSP system - they all have to be in sync. Else a
periodically repeated noise will be heard.
RME supports ASIO Direct Monitoring (ADM). Please note that not all programs support ADM
completely or error-free. The most often reported problem is the wrong behaviour of panorama
in a stereo channel.
In case of a drift between audio and MIDI, or in case of a fixed deviation (MIDI notes placed
close before or behind the correct position), the settings in Cubase/Nuendo have to be
changed. At the time of print the option 'Use System Timestamp' should be activated. The
HDSP system supports both MME MIDI and DirectMusic MIDI. It depends on the used application
which one will work better.
11. Using more than one Hammerfall DSP
The current drivers support operation of up to three HDSPe AIO. All cards of the HDSP and
HDSPe system use the same driver, therefore can be used at the same time. All units have to
be in sync, i.e. have to receive valid sync information either via word clock or by using AutoSync
and feeding synchronized signals.
• If one of the HDSP systems is set to clock mode Master, all others have to be set to clock
mode Slave, and have to be synced from the master, for example by feeding word clock.
The clock modes of all units have to be set up correctly in their Settings dialogs.
• If all units are fed with a synchronous clock, i.e. all units show Sync in their Settings dialog,
all channels can be used at once. This is especially easy to handle under ASIO, as the ASIO
driver presents all units as one.
Note: TotalMix is part of the hardware of each HDSP system. Up to three mixers are available,
but these are separated and can't interchange data. Therefore a global mixer for all units is not
possible.
22
User's Guide HDSP System Multiface II © RME

12. DIGICheck Windows
The DIGICheck software is a unique utility developed for testing, measuring and analysing digital
audio streams. Although this Windows software is fairly self-explanatory, it still includes a
comprehensive online help. DIGICheck 5.34 operates as multi-client ASIO host, therefore can
be used in parallel to any software, be it WDM or ASIO, with both inputs and outputs (!). The
following is a short summary of the currently available functions:
• Level Meter. High precision 24-bit resolution, 2/10/28 channels. Application examples: Peak
level measurement, RMS level measurement, over-detection, phase correlation measurement,
dynamic range and signal-to-noise ratios, RMS to peak difference (loudness), long
term peak measurement, input check. Oversampling mode for levels higher than 0 dBFS.
Supports visualization according to the K-System.
• Hardware Level Meter for Input, Playback and Output. Reference Level Meter freely configurable,
causing near zero CPU load, because calculated from the Fireface hardware.
• Vector Audio Scope. World wide unique Goniometer showing the typical afterglow of a
oscilloscope-tube. Includes Correlation meter and level meter.
• Surround Audio Scope. Professional Surround Level Meter with extended correlation
analysis, ITU weighting and ITU summing meter.
• Spectral Analyser. World wide unique 10-, 20- or 30-band display in analog bandpass-filter
technology. 192 kHz-capable!
• Bit Statistics & Noise. Shows the true resolution of audio signals as well as errors and DC
offset. Includes Signal to Noise measurement in dB and dBA, plus DC measurement.
• Totalyser. Spectral Analyser, Level Meter and Vector Audio Scope in a single window.
• Channel Status Display. Detailed analysis and display of SPDIF and AES/EBU Channel
Status data.
• Global Record. Long-term recording of all channels at lowest system load.
• Completely multi-client. Open as many measurement windows as you like, on any channels
and inputs or outputs!
To install DIGICheck, go to the \DIGICheck directory on the RME Driver CD and run setup.exe.
Follow the instructions prompted on the screen.
DIGICheck is constantly updated. The latest version is always available on our website
www.rme-audio.com, section Downloads / DIGICheck.
User's Guide HDSP System Multiface II © RME 23

13. Hotline – Troubleshooting
The newest information can always be found on our website www.rme-audio.com, section FAQ,
Latest Additions.
The dialog 'New hardware component found’ does not appear:
• Check whether the CardBus card is completely inserted into the PCMCIA slot, or the PCI
interface is correctly inserted in the PCI slot.
The input signal cannot be monitored in real-time
• ASIO Direct Monitoring has not been enabled, and/or monitoring has been disabled globally.
The 8 ADAT channels don’t seem to work
• The optical output has been switched to SPDIF. The ADAT playback devices are still usable
by routing and mixing them in TotalMix to other outputs.
Playback works, but record doesn’t
• Check that there is a valid signal at the input. If so, the current sample frequency is displayed
in the Settings dialog.
• Check whether the HDSP system has been selected as recording device in the audio application.
• Check whether the sample frequency set in the audio application (‘Recording properties’ or
similar) matches the input signal.
• Check that cables/devices have not been connected in a closed loop. If so, set the systems’s
clock mode to Master.
Crackle during record or playback
• Increase the number and size of buffers in the ‘Settings’ dialog or in the application.
• Try different cables (coaxial or optical) to rule out any defects here.
• Check that cables/devices have not been connected in a closed loop. If so, set the system’s
clock mode to ‘Master’.
The Multiface II fails after a few minutes
• The Multiface II requires a HDSP PCI revision 1.9 or higher. Older HDSP PCI cards do not
deliver enough current for the new Multiface II.
24
User's Guide HDSP System Multiface II © RME

User's Guide
Multiface II
Driver Installation and Operation – Mac OS X
User's Guide HDSP System Multiface II © RME 25

14. Hardware Installation
14.1 PCIe Card
26
Before installing the card, please make sure the computer is switched off and the power
cable is disconnected from the mains supply. Inserting or removing the card while the computer
is in operation can cause irreparable damage to both motherboard and card!
1. Disconnect the power cord and all other cables from the computer.
2. Remove the computer's housing. Further information on how to do this can be obtained from
your computer’s instruction manual.
3. Important: Before removing the card from its protective bag, discharge any static in your
body by touching the metal chassis of the computer.
4. Insert the PCI card firmly into a free PCI slot, press and fasten the screw. OR: Insert the PCI
Express card firmly into a free PCI Express slot, press and fasten the screw.
5. Replace the computer's housing.
6. Reconnect all cables including the power cord.
7. Connect PCI card and Multiface using the supplied cable (IEEE1394). This is a standard
FireWire cable (6-pin).
14.2 ExpressCard
Before inserting the CardBus or ExpressCard make sure the complete HDSP system is ready
for operation!
1. Connect the ExpressCard with the Multiface using the supplied cable.
2. Insert the ExpressCard into the appropriate slot.
3. Plug the power jack of the supplied switching power supply into the connector labelled AUX,
on the rear of the Multiface.
4. Connect power cord to power supply (if detachable), then plug the power supply into an AC
outlet. The green LED of the power supply and the red LED of the Multiface will light up.
5. Switch on the notebook and boot the operating system.
14.3 Notes on Power Supply
• The ExpressCard does not deliver power to the Multiface. Therefore a hi-tech switching
power supply is included.
• The PCIe card operates as power supply for the Multiface via the FireWire cable. An external
power supply is not required.
The Multiface II draws a high startup current of more than 2 A during initialisation. Current at 12
Volt operating voltage: unloaded 720 mA (8.6 Watts), loaded 1 A (12 Watts). Supply voltage
range DC 8 V – 28 V, AC 8 V – 20 V.
The Multiface II has a higher power consumption than the original Multiface. Therefore the
Multiface II will only work with a HDSP PCI card revision 1.9 or higher!
While the Multiface causes a load of about 9 Watts to the PCI card, the Multiface II will cause a
load of about 12 Watts. The old HDSP PCI cards are not designed for such a load. The voltage
regulator found on the PCI card will switch off after a short time due to overheating. The HDSP
PCI revision 1.9 uses a more powerful regulator.
All PCI Express cards work with the Multiface II.
User's Guide HDSP System Multiface II © RME

15. Driver and Firmware
15.1 Driver Installation
First fit the card (see 14. Hardware Installation), then switch on the computer and install the
drivers from the RME Driver CD. The driver file is located in the folder HDSPe Series. Installation
works automatically by a double-click on the file hdspe.pkg.
RME recommends to download the latest driver version from the RME website! If done, the
procedure is as follows:
Double-click onto hdspe_x86_xx.zip to expand the archive file to the folder hdspe_xxx which
includes the driver file hdspe.pkg. Installation works automatically by a double-click on this file.
During driver installation the programs HDSPe Settings and HDSPe Mixer (TotalMix) are copied
to the Applications folder. It is recommended to link these two programs to the Dock so that
they are always available.
Reboot the computer when installation is done.
15.2 Driver Update
In case of a driver update it's not necessary to remove the old driver first, it will be overwritten
during the installation. In case of problems the driver files can be deleted manually by dragging
them to the trash bin:
/Applications/Hammerfall DSP Mixer
/Applications/Hammerfall DSP Settings
/Library/Audio/MIDI Drivers/HDSP MADI MIDI.plugin
/System/Library/Extensions/HDSPMADI.kext
/Users/username/Library/Preferences/Hammerfall DSP folder
/Users/username/Library/Preferences/com.rme.HDSPeMixer.plist
/Users/username/Library/Preferences/com.rme.HDSPeSettings.plist
/Library/LaunchAgents/de.rme-audio.hdspAgent.plist
15.3 Firmware Update
The Flash Update Tool updates HDSPe PCI cards or ExpressCards to the latest version. It
requires an already installed driver.
Start the program HDSPe Flash Update. The Flash Update Tool displays the current revision
of the HDSP interface, and whether it needs an update or not. If so, then please manually select
if a PCI card (desktop computer) or a CardBus card (laptop) shall be flashed. Next simply press
the 'Update' button. A progress bar will indicate when the flash process is finished. The bar
moves slowly first (program), then faster (verify).
If more than one interface card is installed, all cards can be flashed by changing to the next tab
and repeating the process.
After the update the PCIe/ExpressCard need to be reset. This is done by powering down and
shutting off the computer. A warm boot is not enough!
When the update fails (status: failure), the card's second BIOS will be used from the next cold
boot on (Secure BIOS Technology). Therefore the card stays fully functional. The flash process
should then be tried again on a different computer.
User's Guide HDSP System Multiface II © RME 27

16. Configuring the Multiface II
16.1 Settings Dialog
Configuring the Multiface II is done via its own settings dialog. The panel 'Settings' can be
opened by clicking on the hammer icon in the dock. The mixer of the Hammerfall DSP System,
TotalMix, can be opened by clicking on the mixer icon in the dock.
The Hammerfall DSP’s hardware offers a number of helpful, well thought-of practical functions
and options which affect how the card operates - it can be configured to suit many different
requirements. The following is available in the 'Settings' dialog:
• Input selection
• Output mode
• Output channel status
• Synchronization behaviour
• Input and output status display
Any changes performed in
the Settings dialog are
applied immediately -
confirmation (e.g. by exiting
the dialog) is not required.
However, settings should
not be changed during
playback or record if it can
be avoided, as this can
cause unwanted noises.
The status displays at the
bottom of the dialog box
give the user precise
information about the
current status of the
system, and the status of all
digital signals. SyncCheck
indicates whether there is a
valid signal (Lock, No Lock)
for each input (Word Clock, ADAT, SPDIF), or if there is a valid and synchronous signal (Sync).
The AutoSync Reference display shows the input and frequency of the current sync source.
SPDIF In
Defines the input for the SPDIF signal. 'Coaxial' relates to the RCA socket, 'Optical' to the optical
TOSLINK input.
SPDIF Out
The SPDIF output signal is constantly available at the phono plug. After selecting 'Optical' it is
also routed to the optical TOSLINK output. For further details about the settings ‘Professional’,
‘Emphasis’ and ‘Non-Audio’, please refer to chapter 23.2.
SPDIF Freq.
Displays the sample rate of the signal at the SPDIF input.
28
User's Guide HDSP System Multiface II © RME

I/O Box
Disconnect interrupts the communication between I/O-box and PCI or CardBus card. In case
the Multiface has been configured using the Settings dialog and TotalMix, Disconnect allows to
use it Stand-Alone (without a connected computer), after a power supply has been attached.
The status display below shows the current state of the I/O-boxt:
Error: I/O-box not connected or missing power
Detected: The interface has found an I/O-box and tries to load the firmware
Connected: Communication between interface and I/O-box operates correctly
Disconnected: Communication between interface and I/O-box has been interrupted, I/O-box
continues operation
Clock Mode
The unit can be configured to use its internal clock source (Master), or the clock source predefined
via Pref. Sync Ref (AutoSync).
Pref Sync Ref
Used to pre-select the desired clock source. If the selected source isn't available, the unit will
change to the next available one. The current clock source and sample rate is displayed in the
AutoSync Ref display.
The automatic clock selection checks and changes between the clock sources Word Clock,
ADAT optical, ADAT Sync and SPDIF.
Word Clock Out
The word clock output signal usually equals the current sample rate. Selecting Single Speed
causes the output signal to always stay within the range of 32 kHz to 48 kHz. So at 96 kHz
sample rate, the output word clock is 48 kHz.
Time Code
Time Code from the input ADAT Sync. Not available for the Multiface II.
System Clock
Shows the current clock state of the HDSP system. The system is either Master (using its own
clock) or Slave (see AutoSync Ref).
SyncCheck
SyncCheck indicates whether there is a valid signal (Lock, No Lock) for each input (Word
Clock, ADAT, SPDIF), or if there is a valid and synchronous signal (Sync). The AutoSync Reference
display shows the input and frequency of the current sync source.
User's Guide HDSP System Multiface II © RME 29

16.2 Clock Modes - Synchronisation
In the digital world, all devices are either the ‘Master’ (clock source) or a ‘Slave’ synchronized to
the master. Whenever several devices are linked within a system, there must always be a single
master clock. The Hammerfall DSP’s intelligent clock control is very user-friendly, being able
to switch between clock modes automatically. Selecting AutoSync will activate this mode.
In AutoSync mode, the system constantly scans all digital inputs for a valid signal. If this signal
corresponds with the current playback sample rate, the card switches from the internal quartz
(AutoSync Ref displays 'Master') to a clock generated from the input signal (AutoSync Ref displays
'Slave'). This allows on-the-fly recording, even during playback, without having to synchronize
the card to the input signal first. It also allows immediate playback at any sample rate
without having to reconfigure the card.
AutoSync guarantees that normal record and record-while-play will always work correctly. In
certain cases however, e.g. when the inputs and outputs of a DAT machine are connected directly
to the Hammerfall DSP, AutoSync may cause feedback in the digital carrier, so synchronization
breaks down. To remedy this, switch the HDSP’s clock mode over to 'Master'.
30
Remember that a digital system can only have one master! If the HDSP’s clock mode is
set to 'Master', all other devices must be set to ‘Slave’.
The Hammerfall DSP's ADAT optical input and the SPDIF input operate simultaneously. Because
there is no input selector however, the HDSP has to be told which of the signals is the
sync reference (a digital device can only be clocked from a single source). This is why the system
has been equipped with automatic clock source selection, which adopts the first available
input with a valid digital signal as the clock reference input. The input currently used as sync
reference is shown in the AutoSync Ref status field, together with its sample frequency.
Via Pref. Sync Ref (preferred synchronization reference) a preferred input can be defined. As
long as the card sees a valid signal there, this input will be designated as the sync source, otherwise
the other inputs will be scanned in turn. If none of the inputs are receiving a valid signal,
the card automatically switches clock mode to ‘Master’.
To cope with some situations which may arise in studio practice, setting ‘Pref Sync Ref’ is essential.
One example: An ADAT recorder is connected to the ADAT1 input (ADAT1 immediately
becomes the sync source) and a CD player is connected to the SPDIF input. Try recording a
few samples from the CD and you will be disappointed. Few CD players can be synchronized.
The samples will inevitably be corrupted, because the signal from the CD player is read with the
(wrong) clock from the ADAT i.e. out of sync. In this case, 'Pref Sync Ref' should be temporarily
set to SPDIF.
User's Guide HDSP System Multiface II © RME

If several digital devices are to be used simultaneously in a system, they not only have to operate
with the same sample frequency but also be synchronous with each other. This is why digital
systems always need a single device defined as ‘master’, which sends the same clock signal
to all the other (‘slave’) devices. RME’s exclusive SyncCheck technology (first implemented in
the Hammerfall) enables an easy to use check and display of the current clock status. The
‘SyncCheck’ field indicates whether no signal (‘No Lock’), a valid signal (‘Lock’) or a valid and
synchronous signal (‘Sync’) is present at each of the digital clock source inputs. The AutoSync
Reference display shows the current sync source and the measured frequency.
In practice, SyncCheck provides the user with an easy way of checking whether all digital devices
connected to the system are properly configured. With SyncCheck, finally anyone can
master this common source of error, previously one of the most complex issues in the digital
studio world.
Thanks to its AutoSync technique and lightning fast PLLs, the HDSP is not only capable of handling
standard frequencies, but also any sample rate between 28 and 103 kHz. Even the word
clock input, which most users will use in varispeed operation, allows any frequency between 28
kHz and 105 kHz.
At 88.2 or 96 kHz: If one of the ADAT inputs has been selected in ‘Pref Sync Ref’, the sample
frequency shown in the ‘SPDIF In’ field differs from the one shown in ‘AutoSync Ref’. The card
automatically switches to its Sample Split mode here, because ADAT optical inputs and outputs
are only specified up to 48 kHz. Data from/to a single input/output is spread over two channels,
the internal frequency stays at 44.1 or 48 kHz. In such cases, the ADAT sample frequency is
only half the SPDIF frequency.
User's Guide HDSP System Multiface II © RME 31

17. Mac OS X FAQ
17.1 Round about Driver Installation
The driver with the file suffix zip provided by RME is a compressed archive. Zip is directly supported
by OS X, a double click on the file is all one needs to do.
The driver consists of a package file (pkg). A double click will start the OS X installer.
The actual audio driver appears as a kernel extension file. The installer copies it to >System/
Library/ Extensions

17.5 Channel Count under Core Audio
At a sample rate of 88.2 or 96 kHz, the ADAT optical input and output operates in S/MUX mode,
so the number of available channels is reduced from 8 to 4.
It is not possible to change the number of Core Audio devices without a reboot of the computer.
Therefore whenever the Fireface changes into Double Speed (88.2/96 kHz) mode all devices
stay present, but become partly inactive.
Single Speed Double Speed
Analog 1 to 8 Analog 1 to 8
SPDIF coax L / R SPDIF L / R
ADAT 1 to 8 ADAT 1 to 4
17.6 Various Information
The driver requires 10.5.8 or higher.
Via >System Preferences/ Audio-MIDI Setup< the hardware can be configured for the system
wide usage. Programs that don't support card or channel selection will use the device selected
as Standard-Input and Standard-Output. (Soundstudio, Mplayer, Amplitube etc.).
In the lower part of the window, the audio hardware's capabilities are shown and can be
changed in some cases. On the record side no changes are possible. Programs that don't support
channel selection will always use channels 1/2, the first stereo pair. To access other inputs
use the following workaround with TotalMix: route the desired input signal to output channels
1/2. Hold the Ctrl key down and click on the labels AN1 and AN2 in the third row. Their labels
turn red, the internal loop mode is active. Result: the desired input signal is now available at
input channel 1/2, without further delay/latency.
Use Speaker Setup to freely configure the playback to all available channels. Even multichannel
playback (Surround, DVD Player) can be set up this way.
18. Using more than one HDSPe System
OS X supports the usage of more than one audio device within an audio software. This is done
via the Core Audio function Aggregate Devices, which allows to combine several devices into
one.
The current driver supports up to three HDSPe in any combination. All units have to be in sync,
i.e. have to receive valid sync information either via word clock or by feeding synchronized signals.
• If one of the units is set to clock mode Master, all others have to be set to clock mode
Slave, and have to be synced from the master, for example by feeding word clock. The
clock modes of all units have to be set up correctly in the Settings dialog.
• If all units are fed with a synchronous clock, i.e. all units show Sync in their Settings dialog,
all channels can be used at once.
Note: TotalMix is part of the hardware of each HDSPe system. Up to three mixers are available,
but these are separated and can't interchange data. Therefore a global mixer for all units is not
possible.
User's Guide HDSP System Multiface II © RME 33

19. DIGICheck Mac
The DIGICheck software is a unique utility developed for testing, measuring and analysing digital
audio streams. Although this Windows software is fairly self-explanatory, it still includes a
comprehensive online help. DIGICheck 0.64 operates in parallel to any software, showing all
input data. The following is a short summary of the currently available functions:
• Level Meter. High precision 24-bit resolution, 2/8/18 channels. Application examples: Peak
level measurement, RMS level measurement, over-detection, phase correlation measurement,
dynamic range and signal-to-noise ratios, RMS to peak difference (loudness), long
term peak measurement, input check. Oversampling mode for levels higher than 0 dBFS.
Supports visualization according to the K-System.
• Hardware Level Meter for Input, Playback and Output. Reference Level Meter freely configurable,
causing near zero CPU load, because calculated from the Fireface hardware.
• Vector Audio Scope. World wide unique Goniometer showing the typical afterglow of a
oscilloscope-tube. Includes Correlation meter and level meter.
• Surround Audio Scope. Professional Surround Level Meter with extended correlation
analysis, ITU weighting and ITU summing meter.
• Spectral Analyser. World wide unique 10-, 20- or 30-band display in analog bandpass filter
technology. 192 kHz-capable!
• Totalyser. Spectral Analyser, Level Meter and Vector Audio Scope in a single window.
• Completely multi-client. Open as many measurement windows as you like, on any channels
and inputs or outputs!
To install DIGICheck, go to the \DIGICheck directory on the RME Driver CD and run setup.exe.
Follow the instructions prompted on the screen.
DIGICheck is constantly updated. The latest version is always available on our website
www.rme-audio.com, section Downloads / DIGICheck.
20. Hotline – Troubleshooting
The newest information can always be found on our website www.rme-audio.com, section Support,
Macintosh OS.
Playback works, but record doesn’t:
• Check that there is a valid signal at the input.
• Check whether the Hammerfall DSP has been selected as recording device in the audio
application.
Crackle during record or playback:
• Increase the number and size of buffers in the application.
• Try different cables to rule out any defects here.
The card and drivers have been installed correctly, but playback does not work:
• Is Hammerfall DSP listed in the System Profiler/PCI? (Vendor 10EE, Device ID 3FC5).
• Has Hammerfall DSP been selected as current playback device in the audio application?
The Multiface II fails after a few minutes
• The Multiface II requires a HDSP PCI revision 1.9 or higher. Older HDSP PCI cards do not
deliver enough current for the new Multiface II.
34
User's Guide HDSP System Multiface II © RME

User's Guide
Multiface II
Disconnect Mode, Connections and TotalMix
User's Guide HDSP System Multiface II © RME 35

21. Disconnect Mode
RME's exclusive Disconnect mode lets you adjust level, input selection and signal mix via your
computer, and simply detach the Multiface afterwards. With this, a stand-alone operation of the
Multiface gets possible. When the Multiface has been configured using Settings dialog and TotalMix,
it won't loose those settings after detaching it from the computer if an external power
supply is used, because the Multiface (as all HDSP I/O-boxes) does not contain memory, so all
settings get lost upon power-off.
If you do not need to record or playback audio with your computer, the Multiface can be used in
a fixed configuration, for example as:
• 8-channel analog/ADAT/analog converter with monitoring
• SPDIF AD- or DA-converter
• Mixer / Patchbay / Distributor analog and digital
• Headphone mixer
• Line splitter with balanced output
• whatever you just need!
The unit can also stay connected to a desktop computer, receiving its power from there. The
Disconnect mode will then cause the unit to be isolated from the computer, no longer be available
to any software or other changes – an interesting security application.
22. Analog Connections
22.1 Line Inputs
The Multiface has eight balanced Line inputs as 1/4" TRS jacks on the back of the unit. The
electronic input stage is built in a servo balanced design which handles unbalanced (mono
jacks) and balanced (stereo jacks) correctly, automatically adjusting the level reference.
36
When using unbalanced cables with TRS jacks: be sure to connect the 'ring' contact of the
TRS jack with ground. Otherwise noise may occur, caused by the unconnected negative
input of the balanced input.
One of the main issues when working with an AD-converter is to maintain the full dynamic
range within the best operating level. Therefore the Multiface II internally uses hi-quality electronic
switches, which allow for a perfect adaptation of all eight inputs to the three most often
used studio levels. The configuration is done with the front panel switch ANALOG LEVEL
INPUTS.
The 'standardized' studio levels do not result in a (often desired) full scale level, but take some
additional digital headroom into consideration. The amount of headroom is different in different
standards, and again differently implemented by different manufacturers. Because of this we
decided to define the levels of the Multiface in the most compatible way.
Reference 0 dBFS @ Headroom
Lo Gain +19 dBu 15 dB
+4 dBu +13 dBu 9 dB
-10 dBV +2 dBV 12 dB
With +4 dBu selected, the according headroom meets the latest EBU recommendations for
Broadcast usage. At -10 dBV a headroom of 12 dB is common practice, each mixing desk operating
at -10 dBV is able to send and receive much higher levels. Lo Gain is best suited for
professional users who prefer to work balanced and at highest levels. Lo Gain provides 15 dB
headroom at +4 dBu nominal level.
User's Guide HDSP System Multiface II © RME

22.2 Line Outputs
The eight short circuit protected, low impedance line outputs are available as 1/4" TRS jacks on
the back of the unit. The electronic output stage is built in a servo balanced design which handles
unbalanced (mono jacks) and balanced (stereo jacks) correctly.
To maintain an optimum level for devices connected to the analog outputs, the Multiface II internally
uses hi-quality electronic switches, which allow for a perfect adaptation of all rear outputs
to the three most often used studio levels. The configuration is done with the front panel
switch ANALOG LEVEL OUTPUTS.
As with the analog inputs, the analog output levels are defined to maintain a problem-free operation
with most other devices. The headroom of the Multiface II lies between 9 and 15 dB,
according to the chosen reference level:
Reference 0 dBFS @ Headroom
Hi Gain +19 dBu 15 dB
+4 dBu +13 dBu 9 dB
-10 dBV +2 dBV 12 dB
With +4 dBu selected, the according headroom meets the latest EBU recommendations for
Broadcast usage. At -10 dBV a headroom of 12 dB is common practice, each mixing desk operating
at -10 dBV is able to send and receive much higher levels. Lo Gain is best suited for
professional users who prefer to work balanced and at highest levels. Lo Gain provides 15 dB
headroom at +4 dBu nominal level.
22.3 Headphones
Channels 19/20 of the Multiface are available on the front via one 1/4" unbalanced TRS jack
(stereo output). This output uses a special hi-grade converter, therefore maintains a very high
signal to noise ratio (119 dBA SNR!).
The output level is changed step-less with the VOL pot. The output is a special low impedance
type, ready to be used with headphones. But it can also be used as high-quality (yet unbalanced)
stereo Line output.
Like all other outputs, the level of channels 19/20 can also be controlled by TotalMix. The monitoring
performed on 19/20 of any input or playback channels (submix, like factory presets 1 and
2) is also controlled from TotalMix.
In case the output should operate
as line output, an adapter TRS plug
to RCA phono plugs, or TRS plug
to TS plugs is required.
The pin assignment follows international
standards. The left channel is
connected to the tip, the right channel
to the ring of the TRS jack/plug.
User's Guide HDSP System Multiface II © RME 37

23. Digital Connections
23.1 ADAT
The ADAT optical input of the HDSP system is fully compatible with all ADAT optical outputs.
RME's unsurpassed Bitclock PLL prevents clicks and drop outs even in extreme varipitch operation,
and guarantees a fast and low jitter lock to the digital input signal. A usual TOSLINK
cable is sufficient for connection. More information on Double Speed (S/MUX) can be found in
chapter 30.3.
ADAT In
Interface for a device sending an ADAT signal to the Multiface. Carries the channels 1 to 8.
When receiving a Double Speed signal, this input carries the channels 1 to 4. Can also be used
as SPDIF optical input.
ADAT Out
Interface for a device receiving an ADAT signal from the Multiface. Transmits channels 1 to 8.
When sending a Double Speed signal, this port carries channels 1 to 4. Can also be used as
SPDIF optical output.
23.2 SPDIF
Input
The SPDIF input is configured in the Settings dialog, available by a click on the hammer symbol
in the Task Bar's system tray. The HDSP system accepts all commonly used digital sources as
well as SPDIF and AES/EBU. Channel status and copy protection are ignored.
To receive signals in AES/EBU format, an
adapter cable is required. Pins 2 and 3 of
a female XLR plug are connected individually
to the two pins of a phono plug.
The cable shielding is only connected to
pin 1 of the XLR - not to the phono plug.
The ground-free design, with transformers for coaxial digital inputs and outputs, offers a troublefree
connection of all devices along with perfect hum rejection and full AES/EBU compatibility.
Output
In SPDIF mode, identical signals are available at both the optical and the coaxial output. An
obvious use for this would be to connect two devices, i.e. using the HDSP as a splitter (distribution
1 on 2).
Apart from the audio data itself, digital signals in SPDIF or AES/EBU format have a header containing
channel status information. False channel status is a common cause of malfunction. The
HDSP system ignores the received header and creates a totally new one for its output signal.
38
Note that in record or monitor modes, set emphasis bits will disappear. Recordings originally
done with emphasis should always be played back with the emphasis bit set!
This can be done by selecting the Emphasis switch in the Settings dialog (field SPDIF Out).
This setting is updated immediately, even during playback.
Note: Recordings with (pre-) emphasis show a treble boost (50/15 µs), which has to be compensated
at playback. Therefore, when selecting Emphasis all analog outputs will be processed
by a treble filter based on 50/15µs, which sounds like a high cut.
User's Guide HDSP System Multiface II © RME

The Multiface’s new output header is optimized for largest compatibility with other digital devices:
• 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz depending on the current sample rate
• Audio use, Non-Audio
• No Copyright, Copy Permitted
• Format Consumer or Professional
• Category General, Generation not indicated
• 2-channel, No Emphasis or 50/15 µs
• Aux bits Audio Use
Professional AES/EBU equipment can be connected to the Multiface thanks to the transformerbalanced
coaxial output, and the ‘Professional’ format option with doubled output voltage. Output
cables should have the same pinout as those used for input (see above), but with a male
XLR plug instead of a female one.
Note that most consumer HiFi equipment (with optical or phono SPDIF inputs) will only accept
signals in ‘Consumer’ format!
The audio bit in the header can be set to 'Non-Audio'. This is often necessary when Dolby AC-3
encoded data is sent to external decoders (surround-sound receivers, television sets etc. with
AC-3 digital inputs), as these decoders would otherwise not recognize the data as AC-3.
23.3 Word Clock
Input
The Multiface's word clock input is a high impedance type (not terminated). Thanks to RME's
Signal Adaptation Circuit, the word clock input still works correctly even with heavily misshaped,
dc-prone, too small or overshoot-prone signals. Thanks to automatic signal centering,
300 mV (0.3V) input level are sufficient in principle. An additional hysteresis reduces sensitivity
to 1.0 V, so that over- and undershoots and high frequency disturbances don't cause a wrong
trigger.
Output
Thanks to a low impedance, but short circuit proof output, the Multiface delivers 4 Vpp to 75
Ohms. For wrong termination with 2 x 75 Ohms (37.5 Ohms), there are still 3.3 Vpp at the output.
Selecting Single Speed in the Settings dialog causes the output signal to always stay within the
range of 32 kHz to 48 kHz. So at 96 kHz sample rate, the output word clock is 48 kHz.
23.4 MIDI
The Multiface offers one MIDI I/O via two 5-pin DIN jacks. The MIDI ports are added to the system
by the driver. Using MIDI capable software, these ports can be accessed under the name
HDSP MIDI. Using more than one Multiface, the operating system adds a consecutive number
to the port name, like HDSP MIDI In (2) etc.
The MIDI ports support multi-client operation. A MIDI input signal can be received from several
programs at the same time. Even the MIDI output can be used by multiple programs simultaneously.
However, due to the limited bandwidth of MIDI, this kind of application will often show
various problems.
Note: The MIDI input LED displays any kind of MIDI activity, including MIDI Clock, MTC and
Active Sensing. The latter is sent by most keyboards every 0.3 seconds.
User's Guide HDSP System Multiface II © RME 39

24. Word Clock
24.1 Technical Description and Usage
In the analog domain one can connect any device to another device, a synchronization is not
necessary. Digital audio is different. It uses a clock, the sample frequency. The signal can only
be processed and transmitted when all participating devices share the same clock. If not, the
signal will suffer from wrong samples, distortion, crackle sounds and drop outs.
AES/EBU, SPDIF and ADAT are self-clocking, an additional word clock connection in principle
isn't necessary. But when using more than one device simultaneously problems are likely to
happen. For example any self-clocking will not work in a loop cabling, when there is no 'master'
(main clock) inside the loop. Additionally the clock of all participating devices has to be synchronous.
This is often impossible with devices limited to playback, for example CD players, as
these have no SPDIF input, thus can't use the self clocking technique as clock reference.
In a digital studio synchronisation is maintained by connecting all devices to a central sync
source. For example the mixing desk works as master and sends a reference signal, the word
clock, to all other devices. Of course this will only work as long as all other devices are
equipped with a word clock or sync input, thus being able to work as slave (some professional
CD players indeed have a word clock input). Then all devices get the same clock and will work
in every possible combination with each other.
40
Remember that a digital system can only have one master!
24.2 Cabling and Termination
Word clock signals are usually distributed in the form of a network, split with BNC T-adapters
and terminated with resistors. We recommend using off-the-shelf BNC cables to connect all
devices, as this type of cable is used for most computer networks. You will find all the necessary
components (T-adapters, terminators, cables) in most electronics and/or computer stores.
The latter usually carries 50 Ohms components. The 75 Ohms components used for word clock
are part of video technology (RG59).
Ideally, the word clock signal is a 5 Volt square wave with the frequency of the sample rate, of
which the harmonics go up to far above 500 kHz. To avoid voltage loss and reflections, both the
cable itself and the terminating resistor at the end of the chain should have an impedance of 75
Ohm. If the voltage is too low, synchronization will fail. High frequency reflection effects can
cause both jitter and sync failure.
Unfortunately there are still many devices on the market, even newer digital mixing consoles,
which are supplied with a word clock output that can only be called unsatisfactory. If the output
breaks down to 3 Volts when terminating with 75 Ohms, you have to take into account that a
device, of which the input only works from 2.8 Volts and above, does not function correctly already
after 3 meter cable length. So it is not astonishing that because of the higher voltage,
word clock networks are in some cases more stable and reliable if cables are not terminated at
all.
Ideally all outputs of word clock delivering devices are designed with very low impedance, but
all word clock inputs with high impedance, in order to not weaken the signal on the chain. But
there are also negative examples, when the 75 Ohms are built into the device and cannot be
switched off. In this case the network load is often 2 x 75 Ohms, and the user is forced to buy a
special word clock distributor. Note that such a device is generally recommended for bigger
studios.
User's Guide HDSP System Multiface II © RME

The word clock input of the Hammerfall DSP is a high-impedance type ensuring maximum flexibility,
and is therefore not terminated. If normal termination is necessary (e.g. because Hammerfall
DSP is the last device in the chain), simply connect a T-adapter to its BNC input jack,
connect the cable supplying the word clock signal to one arm of the T-adapter and terminate the
other with a 75 Ohm resistor (as a short BNC plug).
In case Hammerfall DSP resides within a chain of devices receiving word clock, plug a Tadapter
into Hammerfall DSP’s BNC input jack and the cable supplying the word clock signal to
one end of the adapter (as above), but connect the free end to the next device in the chain via a
further BNC cable. The last device in the chain should be terminated using another T-adapter
and a terminator plug as described in the previous paragraph.
24.3 Operation
The green Lock LED on the front (STATE) will light up as soon as a word clock signal is detected.
To change to word clock as clock source, activate the Clock Source Word in the field
Clock Mode within the Settings dialog. The status display Current changes to Word as soon as
a valid signal is present at the BNC jack. This message has the same meaning as the green
state LED, but appears on the monitor, i.e. the user can check immediately whether a valid
word clock signal is present and is currently being used.
The word clock output of the Multiface is constantly active, providing the current sample frequency
as word clock signal. As a result, in Master mode the provided word clock is defined by
the currently used software. In Slave mode the provided frequency is identical to the one present
at the currently chosen clock input. When the current clock signal fails, the Multiface
switches to Master mode and adjusts itself to the next, best matching frequency (44.1 kHz, 48
kHz etc.).
Selecting Single Speed in the Settings dialog (Output Format Word) causes the output signal to
always stay within the range of 32 kHz to 48 kHz. So at 96 kHz sample rate, the output word
clock is 48 kHz.
User's Guide HDSP System Multiface II © RME 41

42
User's Guide HDSP System Multiface II © RME

User's Guide
Multiface II
TotalMix
User's Guide HDSP System Multiface II © RME 43

25. TotalMix: Routing and Monitoring
25.1 Overview
The Multiface includes a powerful digital real-time mixer, the Hammerfall DSP mixer, based on
RME’s unique, sample-rate independent TotalMix technology. It allows for practically unlimited
mixing and routing operations, with all inputs and playback channels simultaneously, to any
hardware outputs.
Here are some typical applications for TotalMix:
• Setting up delay-free submixes (headphone mixes). The Multiface allows for up to 10 (!) fully
independent stereo submixes. On an analog mixing desk, this would equal 20 (!) Aux sends.
• Unlimited routing of inputs and outputs (free utilisation, patchbay functionality).
• Distributing signals to several outputs at a time. TotalMix offers state-of-the-art splitter and
distributor functions.
• Simultaneous playback of different programs via a single stereo output. The ASIO multiclient
driver supports the usage of several programs at the same time. When done on different
playback channels TotalMix provides the means to mix and monitor these on a single
stereo output.
• Mixing of the input signal to the playback signal (complete ASIO Direct Monitoring). RME not
only is the pioneer of ADM, but also offers the most complete implementation of the ADM
functions.
• Integration of external devices. Use TotalMix to insert external effects devices, be it in the
playback or in the record path. Depending on the current application, the functionality equals
insert or effects send and effects return, for example as used during real-time monitoring
when adding some reverb to the vocals.
Every single input channel, playback channel and hardware output features a Peak and RMS
level meter, calculated in hardware (hardware output is Peak only). These level displays are
very useful to determine the presence and routing destinations of the audio signals.
For a better understanding of the TotalMix mixer you should know the following:
• As shown in the block diagram (next page), the record signal usually stays un-altered. TotalMix
does not reside within the record path, and does not change the record level or the
audio data to be recorded (exception: loopback mode).
• The hardware input signal can be passed on as often as desired, even with different levels.
This is a big difference to conventional mixing desks, where the channel fader always controls
the level for all routing destinations simultaneously.
• The level meter of inputs and playback channels are connected pre-fader, to be able to visually
monitor where a signal is currently present. The level meters of the hardware’s outputs
are connected post-fader, thus displaying the actual output level.
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User's Guide HDSP System Multiface II © RME

User's Guide HDSP System Multiface II © RME 45

25.2 The User Interface
The visual design of the TotalMix mixer is a result of its capability to route hardware inputs and
software playback channels to any hardware output. The Multiface provides 18 input channels,
18 software playback channels, and 20 hardware output channels:
36 channels don't fit on the screen side by side, neither does such an arrangement provide a
useful overview. Therefore, the channels have been arranged as known from an Inline desk, so
that the row Software Playback equals the Tape Return of a real mixing desk:
• Top row: Hardware inputs. The level shown is that of the input signal, i. e. fader independent.
Via fader and routing field, any input channel can be routed and mixed to any hardware
output (bottom row).
• Middle row: Playback channels (playback tracks of the audio software). Via fader and routing
field, any playback channel can be routed and mixed to any hardware output (third row).
• Bottom row (third row): Hardware outputs. Here, the total level of the output can be adjusted.
This may be the level of connected loudspeakers, or the necessity to reduce the level of an
overloaded submix.
Usage: simply click on the hardware output channel where you want to have an audio signal.
This channel turns brighter, means it is selected as current submix. Now move the faders up
from all sources - input and playback channels - that you want to hear at the submix output.
The following chapters explain step by step all functions of the user interface.
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User's Guide HDSP System Multiface II © RME

25.3 The Channels
A single channel consists of various elements:
Input channels and playback channels each have a mute and solo button.
Below there is the panpot, realized as indicator bar (L/R) in order to save space.
In the field below, the present level is displayed in RMS or Peak, being updated about
every half a second. Overs (overload) are indicated here by an additional red dot.
Next is the fader with a level meter. The meter shows both peak values (zero attack, 1
sample is enough for a full scale display) by means of a yellow line, and mathematically
correct RMS values by means of a green bar. The RMS display has a relatively
slow time constant, so that it shows the average loudness quite well.
Below the fader, the current gain and panorama values are shown.
The white area shows the channel name. Selecting one or more channels is done by
clicking on the white label which turns orange then. A click in the third row with
pressed Ctrl-key activates internal loopback mode, the label turns red. A right mouse
click opens a dialog to type in a new name.
The black area (routing field) shows the current routing target. A mouse click opens the routing
window to select a routing target. The list shows all currently activated routings by checkmarks
in front of the routing targets.
25.4 Tour de TotalMix
This chapter is a practical guide and introduction on how to use TotalMix and on how TotalMix
works.
Starting up TotalMix the last settings are recalled automatically. When executing the application
for the first time, a default file is loaded, sending all playback tracks 1:1 to the corresponding
hardware outputs with 0 dB gain, and activating phones monitoring.
Hold down Ctrl and click on preset button 1 to make sure that factory preset 1 is loaded. The
faders in the top row are set to maximum attenuation (called m.a. in the following), so there is
no monitoring of the input channels. The Submix View is active, therefore for improved overview
all outputs except Phones are greyed out. Additionally all faders are set to the routing target
Phones. All faders of the middle row are set to 0 dB, so no matter on which channels a
playback happens, the audio will be audible via the Phones output. Just try it!
We will now create a submix on analog outputs 1/2. Please start a multitrack playback. In the
third row, click on the channels of hardware output AN1 or AN2. The Submix View changes
from Phones to AN1/AN2. Both the fader settings and the output levels of all other channels are
still visible, but greyed out for improved orientation.
As soon as AN1/AN2 became active, all faders of the second row jumped to their bottom position
– except those of playback channel 1/2, because as mentioned above the factory preset
includes a 1:1 routing. Click on AN 3/4 and the faders above are the only active ones, same for
AN5/6 and so on.
Back to AN1/2. Now you can change all the faders of all inputs and playback channels just as
you like, thus making any input and playback signals audible via the outputs AN1/2. The panorama
can be changed too. Click into the area above the fader and drag the green bar in order to
set the panorama between left and right. The level meters of the third row display the level
changes in real-time.
User's Guide HDSP System Multiface II © RME 47

You see, it is very easy to set up a specific submix for whatever output: select output channel,
set up fader and pans of inputs and playbacks – ready!
For advanced users sometimes it makes sense to work without Submix View. Example: you
want to see and set up some channels of different submixes simultaneously, without the need
to change between them all the time. Switch off the Submix View by a click on the green button.
Now the black routing fields below the faders no longer show the same entry (AN1/2), but completely
different ones. The fader and pan position is the one of the individually shown routing
destination.
In playback channel 1 (middle row), labeled Out 1, click onto the
routing field below the label. A list pops up, showing a checkmark in
front of 'AN 1+2' and 'Phones'. So currently playback channel 1 is
sent to these two routing destinations. Click onto 'AN 7+8'. The list
disappears, the routing field no longer shows 'AN1+2', but ' AN
7+8'. Now move the fader with the mouse. As soon as the fader
value is unequal m.a., the present state is being stored and routing
is activated. Move the fader button to around 0 dB. The present
gain value is displayed below the fader in green letters.
In the lower row, on channel 7, you can see the level of what you
are hearing from output 7. The level meter of the hardware output
shows the outgoing level. Click into the area above the fader and
drag the mouse in order to set the panorama, in this case the
routing between channels 7 and 8. The present pan value is also
being displayed below the fader.
Please carry out the same steps for Out 2 now, in order to route it
to output 8 as well.
In short: While editing the Submix AN7/AN8 you have direct access
to other submixes on other channels, because their routing fields
are set to different destinations. And you get a direct view of how
their faders and panoramas are set up.
48
This kind of visual presentation is a mighty one, but for many
users it is hard to understand, and it requires a deep
understanding of complex routing visualizations. Therefore we
usually re-commend to work in Submix View.
Often signals are stereo, i. e. a pair of two channels. It is therefore helpful to be able to make
the routing settings for two channels at once. Hold down the Ctrl-key and click into the routing
field of Out 3. The routing list pops up with a checkmark at 'AN 3+4'. Select 'AN 7+8'. Now, Out
4 has already been set to 'AN 7+8' as well.
When you want to set the fader to exactly 0 dB, this can be difficult, depending on the mouse
configuration. Move the fader close to the 0 position and now press the Shift-key. This activates
the fine mode, which stretches the mouse movements by a factor of 8. In this mode, a gain
setting accurate to 0.1 dB is no problem at all.
Please set Out 4 to a gain of around -20 dB and the pan close to center. Now click onto the
routing field. You'll now see three checkmarks, at 'AN 3+4', 'AN 7+8' and 'Phones'. Click onto
'SPDIF'. The window disappears, fader and pan jump to their initial values, the signal can now
be routed to the SPDIF output. You can continue like this until all entries have got a checkmark,
i. e. you can send the signal to all outputs simultaneously.
User's Guide HDSP System Multiface II © RME

You will certainly have noticed that the signal at the outputs 7/8 did not change while you were
routing channel 4 to other outputs and setting different gain values for those. With all analog
and most digital mixing desks, the fader setting would affect the level for every routed bus - not
so for TotalMix. TotalMix allows for setting all fader values individually. Therefore the faders and
the panpots jump to the appropriate setting as soon as another routing is chosen.
Sometimes you will want the routings not to be independent. Let's say you have sent a signal to
several submixes, and now want to change the signal's volume a bit on all these submixes.
Dragging the faders by use of the right mouse button activates Post Send mode and causes all
routings of the current input or playback channel to be changed in a relative way. Please note
that the fader settings of all routings are memorized. So when pulling the fader to the bottom
(maximum attenuation), the individual settings are back when you right click the mouse and pull
the fader up. The individual settings get lost in m.a. position as soon as the fader is clicked with
the left mouse button. As long as no single level is at m.a. position, the left mouse button can be
used to change the current routing's gain.
The checkmarks are un-checked by moving the fader to m.a. This setting deactivates the routing...why
route if there is no level? Click onto 'AN 7+8' in the routing window, pull the fader
down, open the routing window again - the checkmark is gone.
The number of ADAT channels is reduced automatically when entering Double Speed mode (96
kHz). The display is adjusted accordingly, and all fader settings remain stored.
25.5 Submix View
Such a wide range of possibilities make it difficult to maintain the overview. Because practically
all hardware outputs can be used for different submixes, as shown (up to 10 completely independent
stereo submixes, 5 4-channel submixes etc.). And when opening the routing windows
you might see an army of checkmarks, but you don't get an overwiev, i.e., how the signals come
together and where. This problem is solved by Submix View mode. In this mode, all routing
fileds jump to the routing pair just being selected. You can then see immediately, which channels,
which fader and pan settings make a submix (for example 'AN 7+8'). At the same time the
Submix View simplifies setting up the mixer, as all channels can be set simultaneously to the
same routing destination with just one click.
Changing to a different destination (output channel) is done in any routing field, or by a click on
the desired output pair in the bottom row.
25.6 Mute und Solo
Mute operates pre-fader, thus mutes all currently active routings of the channel. As soon as any
Mute button is pressed, the Mute Master button lights up in the Quick Access area. It allows to
switch all selected mutes off and on again. You can comfortably make mute-groups or activate
and deactivate several Mutes simultaneously.
The same holds true for the Solo and the Solo Master buttons. As with conventional mixing
desks, Solo operates only for the output defined as Monitor Main, as a solo-in-place, post
fader. As soon as one Solo button is pressed, the Solo Master button lights up in the Quick
Access area. It allows to switch all selected Solos off and on again. You can comfortably make
solo-groups or activate and deactivate several Solos simultaneously.
User's Guide HDSP System Multiface II © RME 49

25.7 The Quick Access Panel
This section includes additional options, further improving the handling of TotalMix. The Master
buttons for Mute and Solo have already been described, they allow for group-based working
with these functions.
In the View section the single mixer rows can be made visible or invisible. If the inputs are not
needed for a pristine playback mix, the whole upper row falls out of the picture after a click on
the Input button. If the hardware outputs don't interest you either, the window can thus be reduced
to the playback channels to save space. All combinations are possible and allowed.
As described earlier, Submix sets all routing windows to the same selection.
Deactivating Submix automatically recalls the previous view. The mixer can be
made smaller horizontally and vertically. This way TotalMix can be made
substantially smaller and space-saving on the desktop/screen, if you have to
monitor or set only a few channels or level meters.
The Presets are one of the mightiest and most useful features of TotalMix. Behind
the eight buttons, eight files are hidden (see next chapter). These contain
the complete mixer state. All faders and other settings follow the changing of
preset(s) in real-time, just by a single mouse click. The Save button allows for
storing the present settings in any preset. You can change back and forth
between a signal distribution, complete input monitoring, a stereo and mono mix,
and various submixes without any problem.
Also here, RME's love for details can be seen. If any parameter is being altered
after loading a preset (e. g. moving a fader), the preset display flashes in order
to announce that something has been changed, still showing which state the
present mix is based on.
If no preset button is lit, another preset had been loaded via the File menu and Open file. Mixer
settings can of course be saved the usual way, and have long file names.
Instead of single presets a complete bank of (8) presets can be loaded at once. Advantage: The
names defined for the preset buttons will be stored and loaded automatically.
Up to three Hammerfall DSP systems can be used simultaneously. The Unit buttons switch
between the systems (Multiface, Digiface, HDSP 9652 or HDSP 9632). Holding down Ctrl while
clicking on button Unit 2 or Unit 3 will open another TotalMix window.
25.8 Presets
TotalMix includes eight factory presets, stored within the program. The user presets can be
changed at any time, because TotalMix stores and reads the changed presets from the files
preset11.mix to preset81.mix, located in Windows' hidden directory Documents and Settings,
, Local Settings, Application Data, RME TotalMix. On the Mac the location is in the
folder User, , Library / Preferences / Hammerfall DSP. The first number indicates
the current preset, the second number the current unit.
This method offers two major advantages:
• Presets modified by the user will not be overwritten when reinstalling or updating the driver
• The factory presets remain unchanged, and can be reloaded any time.
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Mouse: The original factory presets can be reloaded by holding down the Ctrl-key and clicking
on any preset button. Alternatively the files described above can be renamed, moved to a different
directory, or being deleted.
Keyboard: Using Ctrl and any number between 1 and 8 (not on the numeric
keypad!) will load the corresponding factory default preset. The key Alt will
load the user presets instead.
When loading a preset file the file name will be displayed in the title bar of the
TotalMix window. Also when loading a preset by the preset buttons, the name
of the preset is displayed in the title bar. This way it is always clear what the
current TotalMix state is based on.
The eight factory presets offer a pretty good base to modify them to your personal needs. In all
factory presets Submix View is active by default.
Preset 1
Description: All channels routed 1:1, monitoring of all playback channels via Phones.
Details: All inputs maximum attenuation. All playback channels 0 dB, routed to the same output.
All outputs 0 dB, Phones -6 dB. Submix of all playbacks to the analog Phones output. Level
display set to RMS +3 dB. View Submix active.
Note: This preset is Default, offering the standard functionality of an I/O-card.
Preset 2
Description: All channels routed 1:1, input and playback monitoring via Phones. As Preset 1,
plus submix of all inputs (0 dB) on Phones.
Preset 3
Description: All channels routed 1:1, input and playback monitoring via Phones and outputs. As
Preset 2, but all inputs set to 0 dB (1:1 pass through).
Preset 4
Description: All channels 1:1, playback monitoring via Phones and outputs. As Preset 3, but all
inputs muted.
Preset 5
Description: All faders m.a. As Preset 1, but all outputs maximum attenuation, only Phones
monitor of the playbacks is active.
Preset 6
Description: Submix on SPDIF at -6 dB. As Preset 1, plus submix of all playbacks on SPDIF.
Preset 7
Description: Submix on SPDIF at -6 dB. As Preset 6, but submix of all inputs and outputs on
SPDIF (SPDIF Monitoring).
Preset 8
Description: Panic. As Preset 4, but playback channels muted too (no output signal).
Preset Banks
Instead of a single preset, all eight presets can be stored and loaded at once. This is done via
Menu File, Save All Presets as and Open All Presets (file suffix .mpr). After the loading the
presets can be activated by the preset buttons. In case the presets have been renamed (see
chapter 25.11), these names will be stored and loaded too.
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25.9 The Monitor Panel
The Monitor panel provides several options usually found on analog mixing desks. It offers
quick access to monitoring functions which are needed all the time in typical studio work.
Monitor Main
Use the drop down menu to select the hardware outputs where your main monitors are connected
to.
Dim
A click on this button will lower the volume of the Monitor Main output by an
amount set up in the Preferences dialog (see below). This is the same as
moving the third row faders down a bit, but much more convenient, as the old
setting is back by a simple mouse click.
Mono
Sets the stereo output defined above to monaural playback. Useful to check for
mono compatibility and phase problems.
Talkback
A click on this button will dim all signals on the Monitor Phones outputs by an
amount set up in the Preferences dialog. At the same time the control room's
microphone signal (source defined in Preferences) is sent to the three destinations
Monitor Phones described below. The microphone level is adjusted with
the channel's input fader.
Monitor Phones 1/2/3
Use the drop down menu to select the hardware outputs where the submixes are sent to. These
submixes are usually phones mixdowns for the musicians. A click on the button allows for the
monitoring of the specific submix via the Monitor Main output. So when setting up or modifying
the submix for the musician this process can be monitored easily and any time.
25.10 Preferences
The dialog box Preferences is available via the
menu Options or directly via F3.
Talkback
Input: Select the input channel of the Talkback
signal (microphone in control room).
Dim: Amount of attenuation of the signals routed to
the Monitor Phones in dB.
Listenback
Input: Select the input channel of the Listenback
signal (microphone in recording room).
Dim: Amount of attenuation of the signals routed to
the Monitor Main in dB.
Monitor Main
Dim: Amount of attenuation of the Monitor Main
output in dB. Activated by the Dim button in the
Monitor panel.
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MIDI Controller
MIDI In: Input where TotalMix receives MIDI Remote data.
MIDI Out: Output where TotalMix sends MIDI Remote data.
Mackie Control Options
Enable Protocol Support: When disabled TM FX will only react on the Control Change commands
of chapter 28.5.
Enable full LCD support: Activates full Mackie Control LCD support with eight channel names
and eight volume/pan values.
Send Level Messages: Activates the transmission of the level meter data.
Stereo Pan Law
The Pan Law can be set to -6 dB, -4.5 dB, -3 dB and 0 dB. The value chosen defines the level
attenuation in pan center position. This setting is useful because the ASIO host often supports
different pan laws too. Selecting the same value here and in the ASIO host, ASIO Direct Monitoring
works perfectly, as both ASIO host and TotalMix use the same pan law. Of course, when
not using ADM it can be changed to a setting different from the factory preset of –6 dB as well.
You will most probably find that -3 dB gives a much more stable loudness when moving an object
between left and right.
25.11 Editing the Names
The channel names shown in the grey label area can be
edited. A right mouse click on the grey name field brings up
the dialog box Enter Name. Any name can be entered in this
dialog. Enter/Return closes the dialog box, the grey label now
shows the first letters of the new name. ESC cancels the
process and closes the dialog box.
Moving the mouse over the label brings
up a tool tip with the complete name.
The hardware outputs
(third row) can be
edited in the same
way. In this case, the
names in the routing drop down menus will change
automatically. Additionally the names in the drop down
menus of the Monitor section will change as well.
The preset buttons can get meaningful
names in the same way. Move the
mouse over a preset button, a right
mouse click will bring up the dialog
box.
Note that the name shows up as tool
tip only, as soon as the mouse stays
over the preset button.
The preset button names are not stored in the preset files, but globally in the registry, so won't
change when loading any file or saving any state as preset. But loading a preset bank (see
chapter 25.8) the names will be updated.
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25.12 Hotkeys
In many situations TotalMix can be controlled quickly and comfortably by the keyboard, making
the mixer setup considerably easier and faster. The Shift-key for the fine mode for faders and
panpots has already been mentioned. The Ctrl-key can do far more than changing the routing
pairwise:
• Clicking anywhere into the fader area with the Ctrl-key pressed, sets the fader to 0 dB.
• Clicking anywhere into the pan area with the Ctrl-key pressed, sets the panorama to
meaning Center.
• Clicking a preset button while holding down Ctrl, the original factory preset will be loaded.
• Using Ctrl and any number between 1 and 8 (not on the numeric keypad!) will load the corresponding
factory default preset. Alt plus number loads the user preset.
• Using multiple Multifaces, clicking the button Unit 2 while holding down Ctrl opens a second
TotalMix window for the second HDSP system, instead of replacing the window contents.
The faders can also be moved pairwise, corresponding to the stereo-routing settings. This is
achieved by pressing the Alt-key and is especially comfortable when setting the SPDIF and
Phones output level. Even the panoramas can be operated with Alt, from stereo through mono
to inversed channels, and also the Mute and Solo buttons (ganged or inversed switching!).
At the same time, TotalMix also supports combinations of these keys. If you press Ctrl and Alt
at the same time, clicking with the mouse makes the faders jump to 0 dB pairwise, and they can
be set pairwise by Shift-Alt in fine mode.
Also very useful: the faders have two mouse areas. The first area is the fader button, which can
be grabbed at any place without changing the current position. This avoids unwanted changes
when clicking onto it. The second area is the whole fader setting area. Clicking into this area
makes the fader jump to the mouse at once. If for instance you want to set several faders to
m.a., it is sufficient to click onto the lower end of the fader path. Which happens pairwise with
the Alt-key pressed.
Using the hotkeys I, O and P the complete row of Input, Playback and Output channels each
can be toggled between visible and invisible. Hotkey S switches Submix view on/off. Those four
hotkeys have the same functionality as the buttons in the View section of the Quick Access
Panel. The Level Meter Setup dialog can be opened via F2 (as in DIGICheck). The dialog box
Preferences is opened via F3.
Hotkey M toggles Mute Master on/off (and with this performs a global mute on/off). Hotkey X
toggles the Matrix view on/off (see chapter 26), hotkey T the mixer view. Hotkey L links all faders
as stereo pairs.
Further hotkeys are available to control the configuration of the Level Meter (see chapter
25.15):
Key 4 or 6: Display range 40 or 60 dB
Key E or R: Numerical display showing Peak or RMS
Key 0 or 3: RMS display absolute or relative to 0 dBFS
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25.13 Menu Options
Always on Top: When active (checked) the TotalMix window will always be on top of the Windows
desktop.
Note: This function may result in problems with windows containing help text, as the TotalMix
window will even be on top of those windows, so the help text isn't readable.
Deactivate Screensaver: When active (checked) any activated Windows screensaver will be
disabled temporarily.
Ignore Position: When active, the windows size and position stored in a file or preset will not
be used. The routing will be activated, but the window will not change.
Ignore I/O Labels: When active the channel names saved in a preset or file will not be loaded,
instead the current ones will be retained.
ASIO Direct Monitoring (Windows only): When de-activated any ADM commands will be
ignored by TotalMix. In other words, ASIO Direct Monitoring is globally de-activated.
Link Faders: Selecting this option all faders will be treated as stereo pairs and moved pairwise.
Hotkey L.
MS Processing: Macro for a quick configuration of routing and phase for Mid/Side encoding
and decoding. See chapter 27.7.
Level Meter Setup: Configuration of the Level Meters. Hotkey F2. See chapter 25.15.
Level Meter Text Color: Colour adjustment for the Gain and Level meter text displays. Default:
Hue 110, Saturation 225, Brightness 135.
Preferences: Opens a dialog box to configure several functions, like Pan Law, Dim, Talkback
Dim, Listenback Dim. See chapter 25.10.
Enable MIDI Control: Turns MIDI control on. The channels which are currently under MIDI
control are indicated by a colour change of the info field below the faders, black turns to yellow.
Deactivate MIDI in Background: Disables the MIDI control as soon as another application is in
the focus, or in case TotalMix has been minimized.
Lock Mixer: Opens a dialog box for password entry. Changes on the mixer have no effect anymore
until the mixer is unlocked in the same way, by entering the password a second time. The
password is stored unencrypted in the registry (Windows: Software, RME, hdspmix, Password).
Undo Load Preset: Turns the mixer state back to the state before the last preset was loaded.
This function helps to get back the last mixer setup that was accidentally destroyed by unintentionally
loading a preset.
25.14 Menu Fader Groups
TotalMix supports 4 different fader groups. Usage:
- Select faders by clicking on the white name label (turns yellow)
- In the menu click on Define – Group X. The level meters below the faders now show GrpX.
- Any group can be activated and deactivated in the menu Activate
- Any group can be deleted in the menu Delete
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25.15 Level Meter
The Multiface II calculates all the display values Peak, Over and RMS in hardware, in order to
be capable of using them independent of the software in use, and to significantly reduce the
CPU load.
Tip: This feature, the Hardware Level Meter, is used by DIGICheck (see chapter 12/19) to
display Peak/RMS level meters of all channels, nearly without any CPU load.
The level meters integrated in TotalMix - considering their size - cannot be compared with
DIGICheck. Nevertheless they already include many useful functions.
Peak and RMS is displayed for every channel. 'Level Meter Setup' (menu Options or F2) and
direct keyboard entry (hotkeys) make various options available:
• Display range 40 or 60 dB (hotkey 4 or 6)
• Release time of the Peak display (Fast/Medium/Slow)
• Numerical display selectable either Peak or RMS (Hotkey E or R)
• Number of consecutive samples for Overload display (1 to 15)
• RMS display absolute or relative to 0 dBFS (Hotkey 3 or 0)
The latter is a point often overlooked, but
nonetheless important. A RMS measurement
shows 3 dB less for sine signals. While this is
mathematically correct, it is not very
reasonable for a level meter. Therefore the
RMS readout is usually corrected by 3 dB, so
that a full scale sine signal shows 0 dBFS on
both Peak and RMS meters.
This setting also yields directly readable
signal-to-noise values. Otherwise the value
shown with noise is 3 dB better than it actually
is (because the reference is not 0 dB, but -3
dB).
The value displayed in the text field is
independent of the setting 40/60 dB, it
represents the full 24 bit range of the RMS
measurement An example: An RME ADI-8 DS
connected to the Multiface's ADAT port will
show around -113 dBFS on all eight channel's
input level meters.
This level display of TotalMix also provides means for a constant monitoring of the signal quality.
Thus it can be a valuable tool for sound optimization and error removal in the studio.
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Measuring SNR (Signal to Noise) requires to press R (for RMS) and 0 (for referring to 0
dBFS, a full scale signal). The text display will then show the same value as an expensive
measurement system, when measuring ‘RMS unweighted’.
Note: There is no RMS calculation for the third row, the physical outputs. Therefore the green
bars show the peak value only.
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26. TotalMix: The Matrix
26.1 Overview
The mixer window of TotalMix looks and operates similar to mixing desks, as it is based on a
conventional stereo design. The matrix display presents a different method of assigning and
routing channels, based on a single channel or monaural design. The matrix view of the HDSP
has the looks and works like a conventional patchbay, adding functionality way beyond comparable
hardware and software solutions. While most patchbays will allow you to connect inputs to
outputs with just the original level (1:1, or 0 dB, as known from mechanical patchbays), TotalMix
allows you to use a freely definable gain value per crosspoint.
Matrix and TotalMix are different ways of displaying the same processes. Because of this both
views are always fully synchronized. Each change in one view is immediately reflected in the
other view as well.
26.2 Elements of the Matrix View
The visual design of the TotalMix Matrix is mainly determined by the architecture of the HDSP
system:
• Horizontal labels: All hardware outputs
• Vertical labels: All hardware inputs. Below are all playback
channels (software playback channels)
• Green 0.0 dB field: Standard 1:1 routing
• Black gain field: Shows the current gain value as dB
• Orange gain field: This routing is muted.
To maintain overview when the window size has been reduced, the left and upper labels are
floating. They won't left the visible area when scrolling.
26.3 Operation
Using the Matrix is a breeze. It is very easy to indentify the current crosspoint, because the
outer labels light up in orange according to the mouse position.
If input 1 is to be routed to output 1, use the mouse and click one time on crosspoint In 1 / An 1.
The green 0.0 dB field pops in, another click removes it. To change the gain (equals the use of
a different fader position, see simultaneous display of the mixer view), hold Ctrl down and drag
the mouse up or down, starting from the gain field. The value within the field changes accordingly.
The corresponding fader in the mixer view is moving simultaneously, in case the currently
modified routing is visible.
Note the difference between the left side, representing the inputs and software playback channels,
and the upper side, representing the hardware outputs. Moving a fader in row 1 or 2 in
TotalMix view, only the specific levels (max. 2) of this routing will change within the Matrix. But
moving a fader in row 3 will make all vertically activated levels move at once (for example
19/20, Phones output).
A gain field marked orange indicates activated mute status. Mute can only be changed in the
mixer view.
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26.4 Advantages of the Matrix
The Matrix not always replaces the mixer view, but it significantly enhances the routing capabilities
and - more important - is a brilliant way to get a fast overview of all active routings. It shows
you in a glance what's going on. And since the Matrix operates monaural, it is very easy to set
up specific routings with specific gains.
Example 1: You want TotalMix to route all software outputs to all corresponding hardware outputs,
and have a submix of all inputs and software outputs on the Phones output (equals factory
preset 2). Setting up such a submix is easy. But how to check at a later time, that all settings
are still exactly the way you wanted them to be, not sending audio to a different output?
The most effective method to check a routing in mixer view is the Submix View, stepping
through all existing software outputs, and having a very concentrated look at the faders and
displayed levels of each routing. That doesn't sound comfortably nor error-free, right? Here is
where the Matrix shines. In the Matrix view, you simply see a line from upper left to lower right,
all fields marked as unity gain. Plus two rows vertically all at the same level setting. You just
need 2 seconds to be sure no unwanted routing is active anywhere, and that all levels match
precisely!
Example 2: The Matrix allows you to set up routings which would be nearly impossible to
achieve by fiddling around with level and pan. Let's say you want to send input 1 to output 1 at 0
dB, to output 2 at -3 dB, to output 3 at -6 dB and to output 4 at -9 dB. Each time you set up the
right channel (2/4), the change in pan destroys the gain setting of the left channel (1/2). A real
hassle! In Matrix view, you simply click on the corresponding routing point, set the level via Ctrlmouse,
and move on. You can see in TotalMix view how pan changes to achieve this special
gain and routing when performing the second (fourth...) setting.
27. TotalMix Super-Features
27.1 ASIO Direct Monitoring (Windows only)
Start Samplitude, Sequoia, Cubase or Nuendo and TotalMix. Activate ADM (ASIO Direct Monitoring),
and move a fader in the ASIO host. Now watch the corresponding fader in TotalMix
magically move too. TotalMix reflects all ADM gain and pan changes in realtime. Please note
that faders only move when the currently activated routing (currently visible routing) corresponds
to the one in the ASIO host. Also note that the Matrix will show any change, as it shows
all possible routings in one view.
With this TotalMix has become a wonderful debugging tool for ADM. Just move the host's fader
and pan, and see what kind of ADM commands TotalMix receives.
The hardware output row faders are included in all gain calculations, in every possible way.
Example: you have lowered the output level of a submix, or just a specific channel, by some dB.
The audio signal passed through via ADM will be attenuated by the value set in the third row.
Tip: ASIO Direct Monitoring is not possible with the headphones output, because it is a mixer
output only, not showing up in the ASIO host. But the Monitor Panel offers a simple workaround.
Select the Phones output as Monitor Main, and the main mix output (for example AN1+2) as
Monitor Phones. When Monitor Phones is activated, the main mix is sent out of the headphone
output – and with it all signals passed through by ADM.
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27.2 Selection and Group-based Operation
Click on the white name label of channel 1 and 2 in TotalMix. Be sure to have channel 3's fader
set to a different position and click on its label too. All three labels have changed to the colour
orange, which means they are selected. Now moving any of these faders will make the other
faders move too. This is called 'building a group of faders', or ganging faders, maintaining their
relative position.
Building groups or ganging can be done in any row, but is limited to operate horizontally within
one row. If you usually don't need this, you can at least gang the analog outputs. The advantage
over holding the Alt-key is that Alt sets both channels to the same level (can be handy too),
while grouping via selection will retain any offset (if you need one channel to be louder all the
time etc.).
Note: The relative positions are memorized until the faders are pulled down so that they reach
upper or lower maximum position and the group is changed (select another channel or deselect
one of the group).
Tip: Gang some submixes and watch all routing levels change in the Matrix view.
27.3 Copy Routings to other Channels
TotalMix allows to copy complete routing schemes of inputs and outputs.
Example 1: You have input 1 (guitar) routed within several submixes/hardware outputs (=
headphones). Now you'll get another input with keyboards that should appear in the same way
on all headphones. Select input 1, open the menu Edit. It shows 'Copy In 1'. Now select the
desired new input, for example In 8. The menu now shows 'Paste In 1 to In 8'. Click on it - done.
If you are familiar with this functionality just use Ctrl-C and Ctrl-V. Else the self updating menu
will always let you know what actually will happen.
Tip: Have the Matrix window open as second window when doing this. It will show the new routings
immediately, so copying is easier to understand and to follow.
Example 2: You have built a comprehensive submix on outputs 4/5, but now need the exact
same signal also on the outputs 6/7. Click on Out 4, Ctrl-C, click on Out 6, Ctrl-V, same with 5/7
- you're done!
The Matrix shows you the difference between both examples. Example 1 means copying lines
(horizontally), while example 2 means copying rows (vertically).
Example 3: Let's say the guitarist finished his recording, and you now need the same signal
again on all headphones, but this time it comes from the recording software (playback row). No
problem, you can even copy between rows 1 and 2 (copying between row 3 and 1/2 isn't possible).
But how to select while a group is active? De-selecting the group first? Not necessary! TotalMix
always updates the copy and paste process with the last selection. This way you don't have to
de-activate any group-selections when desiring to perform a copy and paste action.
27.4 Delete Routings
The fastest way to delete complex routings: select a channel in the mixer view, click on the
menu entry Edit and select Delete. Or simply hit the Del-key. Attention: there is no undo in TotalMix,
so be careful with this function!
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27.5 Recording a Subgroup (Loopback)
TotalMix supports a routing of the subgroup outputs (=hardware outputs, bottom row) to the
recording software. Instead of the signal at the hardware input, the signal at the hardware output
is sent to the record software. This way, complete submixes can be recorded without an
external loopback cable. Also the playback of a software can be recorded by another software.
To activate this function, click on the white label in the third row while holding down the Ctrl-key.
The label's colour changes to red. In case the channel has already been part of a group, the
colour will change from yellow to orange, signalling that the group functionality is still active for
this channel.
In loopback mode, the signal at the hardware input of the corresponding channel is no longer
sent to the recording software, but still passed through to TotalMix*. Therefore TotalMix can be
used to route this input signal to any hardware output. Using the subgroup recording, the input
can still be recorded on a different channel.
* Note: Because of a technical limitation the input's level meter no longer shows the input signal of the hardware – which
still can be routed by TotalMix – but the loopback signal. This gives the false impression of the loopback signal being
present at the TotalMix mixer input, which is not the case.
As each of the 18 hardware outputs can be routed to the record software, and none of these
hardware inputs get lost, TotalMix offers an overall flexibility and performance not rivaled by any
other solution.
Additionally the risk of feedbacks, a basic problem of loopback methods, is highly reduced, because
the feedback can not happen within the mixer, but only when the audio software is
switched into monitoring mode. The block diagram shows how the software's input signal is
played back, and fed back from the hardware output to the software input. A software monitoring
on the subgroup record channels is only allowed as long as the monitoring is routed in both
software and TotalMix to a different channel than the active subgroup recording one.
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Recording a Software's playback
In real world application, recording a software's output with another software will show the following
problem: The record software tries to open the same playback channel as the playback
software (already active), or the playback one has already opened the input channel which
should be used by the record software.
This problem can easily be solved. First make sure that all rules for proper multi-client operation
are met (not using the same record/playback channels in both programs). Then route the playback
signal via TotalMix to a hardware output in the range of the record software, and activate it
via Ctrl-mouse for recording.
Mixing several input signals into one record channel
In some cases it is useful to record several sources in only one track. For example when using
two microphones when recording instruments and loudspeakers. TotalMix' Loopback mode
saves an external mixing desk. Simply route/mix the input signals to the same output (third row),
then re-define this output into a record channel via Ctrl-mouse – that's it. This way any number
of input channels from different sources can be recorded into one single track.
27.6 Using external Effects Devices
With TotalMix a usage of external hardware - like effects devices - is easy and flexible.
Example 1: The singer (microphone input channel 10) shall have some reverb on his headphones
(outputs 9/10). A direct routing In 10 to Out 9/10 for monitoring had been set up already.
The external reverb is connected to a free output, for example channel 8. In active mode Submix
View click on channel 8 in the bottom row. Drag the fader of input 10 to about 0 dB and the
panorama fully to the right. Adjust the input level at the reverb unit to an optimal setting. Next
the output of the reverb unit is connected to a free stereo input, for example 5/6. Use the TotalMix
level meters to adjust a matching output level at the reverb unit. Now click on channels
9/10 in the bottom row, and move the fader of inputs 5/6 until the reverb effect gets a bit too
loud in the headphones. Now click on channel 8 in the bottom row again and drag fader 10
down a bit until the mix of original signal and reverb is perfect for the singer.
The described procedure is completely identical to the one when using an analog mixing desk.
There the signal of the singer is sent to an output (usually labeled Aux), from there to a reverb
unit, sent back from the reverb unit as stereo wet signal (no original sound), back in through a
stereo input (e.g. Effect return) and mixed to the monitoring signal. The only difference: The Aux
sends on mixing desks are post-fader. Changing the level of the original signal causes a
change of the effects level (here the reverb) too, so that both always have the same ratio.
Tip: Such a functionality is available in TotalMix via the right mouse button! Dragging the faders
by use of the right mouse button causes all routings of the current input or playback channel to
be changed in a relative way. This completely equals the function Aux post fader.
Example 2: Inserting an effects device can be done as above, even within the record path.
Other than in the example above the reverb unit also sends the original signal, and there is no
routing of input 10 directly to outputs 9/10. To insert an effects device like a Compressor/Limiter
directly into the record path, the input signal of channel 10 is sent by TotalMix to any output, to
the Compressor, back from the Compressor to any input. This input is now selected within the
record software.
Unfortunately, very often it is not possible within the record software to assign a different input
channel to an existing track 'on the fly'. The loopback mode solves this problem elegantly. The
routing scheme stays the same, with the input channel 10 sent to any output via TotalMix, to the
Compressor, from the Compressor back to any input. Now this input signal is routed directly to
output 10, and output 10 is then switched into loopback mode via Ctrl-mouse.
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As explained in chapter 27.5, the hardware input of channel 10 now no longer feeds the record
software, but is still connected to TotalMix (and thus to the Compressor). The record software
receives the signal of submix channel 10 instead – the Compressor's return path.
27.8 MS Processing
The mid/side principle is a special positioning technique for microphones, which results in a mid
signal on one channel and a side signal on the other channel. These information can be transformed
back into a stereo signal quite easily. The process sends the monaural mid channel to
left and right, the side channel too, but phase inverted (180°) to the right channel. For a better
understanding: the mid channel represents the function L+R, while the side channel represents
L-R.
During record the monitoring needs
to be done in 'conventional' stereo.
As TotalMix can invert the phase, it
also offers the functionality of a M/Sdecoder.
The menu Options includes
a macro to simplify the setup. First
select the two input channels, in the
picture to the right In 3 and 4, having
the current routing destination Out
1+2. Now the string MS Processing In
3+4 to Out 1+2 On is shown in
Options.
62
After a mouse click TotalMix sets gains and pans correctly. Of course
these settings can also be performed manually. Repeat the last step to
remove all routings (menu Options ...Off).
The M/S-Processing automatically operates as M/S encoder or decoder, depending on the
source signal format. When processing a usual stereo signal, all monaural information will be
shifted into the left channel, all stereo information into the right channel. Thus the stereo signal
is M/S encoded. This yields some interesting insights into the mono/stereo contents of modern
music productions. Additionally some very interesting methods of manipulating the stereo base
and generating stereo effects come up, as it is then very easy to process the side channel with
Low Cut, Expander, Compressor or Delay. The most basic application is already available directly
in TotalMix: Changing the level of the side channel allows to manipulate the stereo width
from mono to stereo up to extended, step-less and in real-time.
User's Guide HDSP System Multiface II © RME

28. TotalMix MIDI Remote Control
28.1 Overview
TotalMix can be remote controlled via MIDI. It is compatible to the widely spread Mackie Control
protocol, so TotalMix can be controlled with all hardware controllers supporting this standard.
Examples are the Mackie Control, Tascam US-2400 or Behringer BCF 2000.
Additionally, the stereo output faders (lowest row) which are set up as Monitor Main outputs in
the Monitor panel can also be controlled by the standard Control Change Volume via MIDI
channel 1. With this, the main volume of the Multiface is controllable from nearly any MIDI
equipped hardware device.
28.2 Mapping
TotalMix supports the following Mackie Control surface elements*:
Element: Meaning in TotalMix:
Channel faders 1 – 8 volume
Master fader Main Monitor channel's faders
SEL(1-8) + DYNAMICS reset fader to Unity Gain
V-Pots 1 – 8 pan
pressing V-Pot knobs pan = center
CHANNEL LEFT or REWIND move one channel left
CHANNEL RIGHT or FAST FORWARD move one channel right
BANK LEFT or ARROW LEFT move eight channels left
BANK RIGHT or ARROW RIGHT move eight channels right
ARROW UP or Assignable1/PAGE+ move one row up
ARROW DOWN or Assignable2/PAGE- move one row down
EQ Master Mute
PLUGINS/INSERT Master Solo
STOP Dim Main Monitor
PLAY Talkback
PAN Mono Main Monitor
MUTE Ch. 1 – 8 Mute
SOLO Ch. 1 – 8 Solo
SELECT Ch. 1 – 8 Select
REC Ch. 1 – 8 in Submix mode only: select output bus
F1 - F8 load preset 1 - 8
F9 select Main Monitor
F10 - F12 Monitor Phones 1 - 3
*Tested with Behringer BCF2000 Firmware v1.07 in Mackie Control emulation for Steinberg mode and with Mackie
Control under Mac OS X.
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28.3 Setup
• Open the Preferences dialog (menu Options or F3). Select the MIDI Input and MIDI Output
port where your controller is connected to.
• When no feedback is needed (when using only standard MIDI commands instead of Mackie
Control protocol) select NONE as MIDI Output.
• Check Enable MIDI Control in the Options menu.
28.4 Operation
The channels being under MIDI control are indicated by a colour change of the info field below
the faders, black turns to yellow.
The 8-fader block can be moved horizontally and vertically, in steps of one or eight channels.
Faders can be selected to gang them.
In Submix View mode, the current routing destination (output bus) can be selected via REC Ch.
1 – 8. This equals the selection of a different output channel in the lowest row by a mouse click
when in Submix View. In MIDI operation it is not necessary to jump to the lowest row to perform
this selection. This way even the routing can be easily changed via MIDI.
Full LC Display Support: This option in Preferences (F3) activates complete Mackie Control
LCD support with eight channel names and eight volume/pan values.
64
Attention: this feature causes heavy traffic on the MIDI port when ganging more than 2
faders! In such a case, or when using the Behringer BCF2000, turn off this option.
When Full LC Display Support is turned off, only a brief information about the first fader of the
block (channel and row) is sent. This brief information is also available on the LED display of
the Behringer BCF2000.
Deactivate MIDI in Background (menu Options) disables the MIDI control as soon as another
application is in the focus, or in case TotalMix has been minimized. This way the hardware controller
will control the main DAW application only, except when TotalMix is in the foreground.
Often the DAW application can be set to become inactive in background too, so that MIDI control
is switched between TotalMix and the application automatically when switching between
both applications.
TotalMix also supports the 9th fader of the Mackie Control. This fader (labelled Master) will control
the stereo output faders (lowest row) which are set up as Main Monitor outputs in the Monitor
panel.
User's Guide HDSP System Multiface II © RME

28.5 Simple MIDI Control
The stereo output faders (lowest row) which are set up as Monitor Main outputs in the Monitor
panel can also be controlled by the standard Control Change Volume via MIDI channel 1.
With this, the main volume of the Multiface is controllable from nearly any MIDI equipped hardware
device.
Even if you don't want to control all faders and pans, some buttons are highly desired to be
available in 'hardware'. These are mainly the Talkback and the Dim button, and the new monitoring
options (listen to Phones submixes). Fortunately a Mackie Control compatible controller is
not required to control these buttons, as they are steered by simple Note On/Off commands on
MIDI channel 1.
The notes are (hex / decimal / keys):
Monitor Main: 3E / 62 / D 4
Dim: 5D / 93 / A 6
Mono: 2A / 42 / #F 2
Talkback: 5E / 94 / #A 6
Monitor Phones 1: 3F / 63 / #D 4
Monitor Phones 2: 40 / 64 / E 4
Monitor Phones 3: 41 / 65 / F 4
Preset 1: 36 / 54 / #F 3
Preset 2: 37 / 55 / G 3
Preset 3: 38 / 56 / #G 3
Preset 4: 39 / 57 / A 3
Preset 5: 3A / 58 / #A 3
Preset 6: 3B / 59 / B 3
Preset 7: 3C / 60 / C 4
Preset 8: 3D / 61 / #C 4
Note: Switching off Mackie Protocol support in Settings / Mackie Control Options will also disable
the above simple MIDI note commands, as they are part of the Mackie protocol.
Furthermore all faders of all three rows can be controlled via simple Control Change commands.
The format for the Control Change commands is:
The format for the Control Change commands is:
Bx yy zz
x = MIDI channel
yy = control number
zz = value
The first row in TotalMix is addressed by MIDI channels 1 up to 4, the middle row by channels 5
up to 8 and the bottom row by channels 9 up to 12.
16 Controller numbers are used: 102 up to 117 (= hex 66 to 75). With these 16 Controllers (=
faders) and 4 MIDI channels each per row, up to 64 faders can be controlled per row (as required
by the HDSPe MADI).
User's Guide HDSP System Multiface II © RME 65

Examples for sending MIDI strings*:
- Set input 1 to 0 dB: B0 66 40
- Set input 17 to maximum attenuation: B1 66 0
- Set playback 1 to maximum: B4 66 7F
- Set Output 16 to 0 dB: B8 75 40
*Note: Sending MIDI strings requires the use of programmer's logic for the MIDI channel, starting
with 0 for channel 1 and ending with 15 for channel 16.
28.6 Loopback Detection
The Mackie Control protocol requires feedback of the received commands, back to the hardware
controller. So usually TotalMix will be set up with both a MIDI input and MIDI output. Unfortunately
any small error in wiring and setup will cause a MIDI feedback loop here, which then
completely blocks the computer (the CPU).
To prevent the computer from freezing, TotalMix sends a special MIDI note every 0.5 seconds
to its MIDI output. As soon as it detects this special note at the input, the MIDI functionality is
disabled. After fixing the loopback, check Enable MIDI Control under Options to reactivate the
TotalMix MIDI.
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User's Guide HDSP System Multiface II © RME

User's Guide
Multiface II
Technical Reference
User's Guide HDSP System Multiface II © RME 67

29. Technical Specifications
29.1 Analog
AD
• Resolution: 24 bit
• Signal to Noise ratio (SNR): 107.5 dB RMS unweighted, 111.5 dBA
• THD: < -100 dB, < 0.001 %
• THD+N: < -98 dB, < 0.0012 %
• Channel separation: > 100 dB
• Frequency response AD @ 44.1 kHz, -0.5 dB: 5 Hz – 21.0 kHz
• Frequency response AD @ 96 kHz, -0.5 dB: 5 Hz – 45.3 kHz
• Input: 6.3 mm TRS jack, electronically balanced
• Input impedance: 10 kOhm
• Input sensitivity switchable to Lo Gain, +4 dBu, -10 dBV
• Input level for 0 dBFS @ Lo Gain: +19 dBu
• Input level for 0 dBFS @ +4 dBu: +13 dBu
• Input level for 0 dBFS @ -10 dBV: +2 dBV
DA
• Resolution: 24 bit
• Dynamic Range (DR): 109 dB RMS unweighted, 112 dBA
• THD: < - 100 dB, < 0.001 %
• THD+N: < -97 dB, < 0.0014 %
• Channel separation: > 110 dB
• Maximum output level: +19 dBu
• Frequency response DA @ 44.1 kHz, -0.5 dB: 5 Hz – 20.9 kHz
• Frequency response DA @ 96 kHz, -0.5 dB: 5 Hz – 45.8 kHz
• Output: 6.3 mm TRS jack, servo-balanced
• Output impedance: 100 Ohm
• Output level switchable Hi Gain, +4 dBu, -10 dBV
• Output level at 0 dBFS @ Hi Gain: +19 dBu
• Output level at 0 dBFS @ +4 dBu: +13 dBu
• Output level at 0 dBFS @ -10 dBV: +2 dBV
Stereo Monitor Output
• Maximum output level at 0 dBFS: +17 dBu
• Dynamic Range: 116 dB (RMS unweighted, unmuted), 119 dBA
• THD+N: -100 dB / 0.001 %
• Channel separation: > 110 dB
• Frequency response DA @ 44.1 kHz, -0.5 dB: 5 Hz – 20.8 kHz
• Frequency response DA @ 96 kHz, -0.5 dB: 5 Hz - 44 kHz
• Output impedance: 30 Ohm
29.2 Digital
• Low Jitter Design: < 3 ns external clock, < 1 ns internal clock
• Internal sample rates: 32 / 44.1 / 48 / 88.2 / 96 kHz
• Supported sample rates through word clock: 28 kHz - 103 kHz
• Internal resolution: 24 bit
• Input PLL ensures zero dropout, even at more than 40 ns jitter
• Bitclock PLL for trouble-free varispeed ADAT operation
• Ground-free digital inputs and outputs
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29.3 Digital Inputs
SPDIF - AES/EBU
• 1 x RCA, transformer-balanced, galvanically isolated, according to AES3-1992
• High-sensitivity input stage (< 0.3 Vpp)
• SPDIF compatible (IEC 60958)
• Accepts Consumer and Professional format, copy protection will be ignored
• Lock range: 28 kHz – 103 kHz
• Jitter when synced to input signal: < 3 ns
ADAT Optical
• 1 x TOSLINK, format according to Alesis specification
• Standard: 8 channels 24 bit, up to 48 kHz
• Double Speed (S/MUX): 4 channels 24 bit 96 kHz
• Bitclock PLL ensures perfect synchronisation even in varispeed operation
• Lock range: 31.5 kHz – 55 kHz
• Jitter when synced to input signal: < 3 ns
Word Clock
• BNC, not terminated (10 kOhm)
• Automatic Double Speed detection and internal conversion to Single Speed
• Not affected by DC-offsets within the network
• Signal Adaptation Circuit: signal refresh through auto-center and hysteresis
• Overvoltage protection
• Level range: 1.0 Vpp – 5.6 Vpp
• Lock Range: 28 kHz – 105 kHz
• Jitter when synced to input signal: < 3 ns
29.4 Digital Outputs
SPDIF - AES/EBU
• 1 x RCA, transformer-balanced, galvanically isolated, according to AES3-1992
• Output level Professional 2.6 Vpp, Consumer 1.2 Vpp
• Format Professional according to AES3-1992 Amendment 4
• Format Consumer (SPDIF) according to IEC 60958
• Single Wire mode, sample rate 28 kHz up to 103 kHz
ADAT
• 1 x TOSLINK
• Standard: 8 channels 24 bit, up to 48 kHz
• Double Speed (S/MUX): 4 channels 24 bit 96 kHz
Word Clock
• BNC, max. output voltage: 5 Vpp
• Output voltage @ 75 Ohm termination: 4.0 Vpp
• Output impedance: 10 Ohm
• Frequency range: 27 kHz – 200 kHz
29.5 MIDI
• 1 x MIDI I/O via 5-pin DIN jacks
• Galvanically isolated by optocoupled input
• Hi-speed mode: Jitter and response time typically below 1 ms
• Separate 128 byte FIFOs for input and output
User's Guide HDSP System Multiface II © RME 69

29.6 General
• Power supply: external switching power supply, 100 - 240 V AC, 15 Watt
• Current at 12 Volt operating voltage, unloaded: 720 mA (8.6 Watt)
• Current at 12 Volt operating voltage, loaded: 1 A (12 Watt)
• Typical power consumption: 12 Watt
• Voltage range: DC 8 V – 28 V, AC 8 V – 20 V
• Dimensions including rack ears (WxHxD): 265 x 44 x 165 mm (10.5" x 1.73" x 6.5")
• Dimensions without rack ears/handles (WxHxD): 218 x 44 x 155 mm (8.6" x 1.73" x 6.1")
• Weight: 1.5 kg ( 3.3 lbs)
• Temperature range: +5° up to +50° Celsius (41° F up to 122°F)
• Relative humidity: < 75%, non condensing
30. Technical Background
30.1 Lock and SyncCheck
Digital signals consist of a carrier and the data. If a digital signal is applied to an input, the receiver
has to synchronize to the carrier clock in order to read the data correctly. To achieve this,
the receiver uses a PLL (Phase Locked Loop). As soon as the receiver meets the exact frequency
of the incoming signal, it is locked. This Lock state remains even with small changes of
the frequency, because the PLL tracks the receiver's frequency.
If an ADAT or SPDIF signal is applied to the Multiface, the corresponding input LED starts flashing.
The unit indicates LOCK, i. e. a valid input signal (in case the signal is also in sync, the LED
is constantly lit, see below).
Unfortunately, LOCK does not necessarily mean that the received signal is correct with respect
to the clock which processes the read out of the embedded data. Example [1]: The Multiface is
set to 44.1 kHz internally (clock mode Master), and a mixing desk with ADAT output is connected
to input ADAT1. The corresponding LED will show LOCK immediately, but usually the
mixing desk's sample rate is generated internally (also Master), and thus slightly higher or lower
than the Multiface's internal sample rate. Result: When reading out the data, there will frequently
be read errors that cause clicks and drop outs.
Also when using multiple inputs, a simple LOCK is not sufficient. The above described problem
can be solved elegantly by setting the Multiface from Master to AutoSync (its internal clock will
then be the clock delivered by the mixing desk). But in case another, un-synchronous device is
connected, there will again be a slight difference in the sample rate, and therefore clicks and
drop outs.
In order to display those problems optically at the device, the Multiface includes SyncCheck ® . It
checks all clocks used for synchronicity. If they are not synchronous to each other (i. e. absolutely
identical), the SYNC LED of the asynchronous input flashes. In case they are completely
synchronous, all LEDs are constantly lit. In example 1 it would have been obvious that the LED
ADAT 1 kept on flashing after connecting the mixing desk.
In practice, SyncCheck allows for a quick overview of the correct configuration of all digital devices.
So one of the most difficult and error-prone topics of the digital studio world finally becomes
easy to handle.
The same information is presented in the Multiface's Settings dialog. In the status display Sync-
Check the state of all clocks is decoded and shown as simple text (No Lock, Lock, Sync).
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30.2 Latency and Monitoring
The term Zero Latency Monitoring has been introduced by RME in 1998 for the DIGI96 series
of audio cards. It stands for the ability to pass-through the computer's input signal at the interface
directly to the output. Since then, the idea behind has become one of the most important
features of modern hard disk recording. In the year 2000, RME published two ground-breaking
Tech Infos on the topics Low Latency Background, which are still up-to-date: Monitoring, ZLM
and ASIO, and Buffer and Latency Jitter, both found on the RME Driver CD and the RME website.
How much Zero is Zero?
From a technical view there is no zero. Even the analog pass-through is subject to phase errors,
equalling a delay between input and output. However, delays below certain values can
subjectively be claimed to be a zero-latency. This applies to analog routing and mixing, and in
our opinion also to RME's Zero Latency Monitoring. The term describes the digital path of the
audio data from the input of the interface to its output. The digital receiver of the Multiface can't
operate un-buffered, and together with TotalMix and the output via the transmitter, it causes a
typical delay of 4 samples. At 44.1 kHz this equals about 90 µs (0.000090 s). In double speed
mode, the delay doubles to 8 samples, for both ADAT and SPDIF.
Oversampling
While the delays of digital interfaces can be disregarded altogether, the analog inputs and outputs
do cause a significant delay. Modern converter chips operate with 64 or 128 times oversampling
plus digital filtering, in order to move the error-prone analog filters away from the audible
frequency range as far as possible. This typically generates a delay of one millisecond. A
playback and re-record of the same signal via DA and AD (loopback) then causes an offset of
the newly recorded track of about 2 ms. The exact delays of the Multiface II are:
Sample frequency kHz 44.1 48 88.2 96
AD (43.2 x 1/fs) ms 0.98 0.9 0.49 0.45
DA (28 x 1/fs) ms 0.63 0.58 0.32 0.29
Buffer Size (Latency)
Windows: This option found in the Settings dialog defines the size of the buffers for the audio
data used in ASIO and WDM (see chapter 8 / 10).
Mac OS X: The buffer size is defined within the application. Only some do not offer any setting.
For example iTunes is fixed to 512 samples.
General: A setting of 64 samples at 44.1 kHz causes a latency of 1.5 ms, for record and playback
each. But when performing a digital loopback test no latency/offset can be detected. The
reason is that the software naturally knows the size of the buffers, therefore is able to position
the newly recorded data at a place equalling a latency-free system.
AD/DA Offset under ASIO and OS X: ASIO (Windows) and Core Audio (Mac OS X) allow for the
signalling of an offset value to correct buffer independent delays, like AD- and DA-conversion or
the Safety Buffer described below. An analog loopback test will then show no offset, because
the application shifts the recorded data accordingly. Because in real world operation analog
record and playback is unavoidable, the drivers include an offset value matching the Multiface's
converter delays.
Therefore, in a digital loopback test a negative offset of about 2 ms occurs. This is no real
problem, because this way of working is more than seldom, and usually the offset can be compensated
manually within the application. Additionally, keep in mind that even when using the
digital I/Os usually at some place an AD- and DA-conversion is involved (no sound without DAconversion...).
User's Guide HDSP System Multiface II © RME 71

Note: Cubase and Nuendo display the latency values signalled from the driver separately for
record and playback. While with our former cards these values equalled exactly the buffer size
(for example 3 ms at 128 samples), the Multiface displays an additional millisecond – the time
needed for the AD/DA-conversion.
Core Audios Safety Offset
Under OS X, every audio interface has to use a so called safety offset, otherwise Core Audio
won't operate click-free. The Multiface uses a safety offset of 32 samples. This offset is signalled
to the system, and the software can calculate and display the total latency of buffer size
plus AD/DA offset plus safety offset for the current sample rate.
30.3 DS - Double Speed
When activating the Double Speed mode the Multiface operates at double sample rate. The
internal clock 44.1 kHz turns to 88.2 kHz, 48 kHz to 96 kHz. The internal resolution is still 24 bit.
Sample rates above 48 kHz were not always taken for granted, and are still not widely used
because of the CD format (44.1 kHz) dominating everything. Before 1998 there were no receiver/transmitter
circuits available that could receive or transmit more than 48 kHz. Therefore a
work-around was used: instead of two channels, one AES line only carries one channel, whose
odd and even samples are being distributed to the former left and right channels. By this, you
get the double amount of data, i. e. also double sample rate. Of course in order to transmit a
stereo signal two AES/EBU ports are necessary then.
This transmission mode is called Double Wire in the professional studio world, and is also
known as S/MUX (abbreviation for Sample Multiplexing) in connection with the ADAT format.
The AES3 specification uses the uncommon term Single channel double sampling frequency
mode.
Not before February 1998, Crystal shipped the first 'single wire' receiver/transmitters that could
also work with double sample rate. It was then possible to transmit two channels of 96 kHz data
via one AES/EBU port.
But Double Wire is still far from being dead. On one hand, there are still many devices which
can't handle more than 48 kHz, e. g. digital tape recorders. But also other common interfaces
like ADAT or TDIF are still using this technique.
Because the ADAT interface does not allow for sampling frequencies above 48 kHz (a limitation
of the interface hardware), the Multiface automatically uses the Sample Multiplexing method in
DS mode. One channel's data is distributed to two channels according to the following table:
ADAT Ch. 1 2 3 4 5 6 7 8
DS Channel
Samples
72
1
1a
1
1b
2
2a
As the transmission of double rate signals is done at standard sample rate (Single Speed), the
ADAT outputs still deliver 44.1 kHz or 48 kHz.
2
2b
3
3a
User's Guide HDSP System Multiface II © RME
3
3b
4
4a
4
4b

30.4 AES/EBU - SPDIF
The most important electrical properties of 'AES' and 'SPDIF' can be seen in the table below.
AES/EBU is the professional balanced connection using XLR plugs. The standard is being set
by the Audio Engineering Society based on the AES3-1992. For the 'home user', SONY and
Philips have omitted the balanced connection and use either Phono plugs or optical cables
(TOSLINK). The format called S/P-DIF (SONY/Philips Digital Interface) is described by IEC
60958.
Type AES3-1992 IEC 60958
Connection XLR RCA / Optical
Mode Balanced Un-balanced
Impedance 110 Ohm 75 Ohm
Level 0.2 V up to 5 Vss 0.2 V up to 0.5 Vss
Clock accuracy not specified I: ± 50ppm
II: 0,1%
III: Variable Pitch
Jitter < 0.025 UI (4.4 ns @ 44.1 kHz) not specified
Besides the electrical differences, both formats also have a slightly different setup. The two
formats are compatible in principle, because the audio information is stored in the same place in
the data stream. However, there are blocks of additional information, which are different for both
standards. In the table, the meaning of the first byte (#0) is shown for both formats. The first bit
already determines whether the following bits should be read as Professional or Consumer
information.
Byte Mode Bit 0 1 2 3 4 5 6 7
0 Pro P/C Audio? Emphasis Locked Sample Freq.
0 Con P/C Audio? Copy Emphasis Mode
It becomes obvious that the meaning of the following bits differs quite substantially between the
two formats. If a device like a common DAT recorder only has an SPDIF input, it usually understands
only this format. In most cases, it will switch off when being fed Professional-coded data.
The table shows that a Professional-coded signal would lead to malfunctions for copy prohibition
and emphasis, if being read as Consumer-coded data.
Nowadays many devices with SPDIF input can handle Professional subcode. Devices with
AES3 input almost always accept Consumer SPDIF (passive cable adapter necessary).
User's Guide HDSP System Multiface II © RME 73

31. Diagrams
31.1 Block Diagram Multiface II
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31.2 Connector Pinouts
TRS jacks of analog input / output
The stereo ¼" TRS jacks of the analog inputs and outputs are wired according to international
standards:
Tip = + (hot)
Ring = – (cold)
Sleeve = GND
The servo balanced input and output circuitry allows to use monaural TS jacks (unbalanced)
with no loss in level. This is the same as when using a TRS-jack with ring connected to ground.
TRS Phones jack
The analog monitor output on
the front is accessible through
a stereo ¼" TRS jack. This
allows a direct connection of
headphones. In case the output
should operate as Line output,
an adapter TRS plug to RCA
phono plugs, or TRS plug to TS
plugs is required.
The pin assignment follows
international standards. The left
channel is connected to the tip,
the right channel to the ring of
the TRS jack/plug.
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User's Guide
Multiface II
Miscellaneous
User's Guide HDSP System Multiface II © RME 77

32. Accessories
RME offers several optional accessories. Additionally parts of the HDSP system are available
separately.
Part Number Description
36000 19“, 1UH Universal rack holder
This 19" rack holder has holes for Digiface and Multiface. Two units can be installed side by
side in any combination. The rack holder also includes holes for nearly all 19" half-rack units
from other manufacturers.
36001 FireWire cable IEEE1394 6M/6M, 1 m (3.3 ft)
36002 FireWire cable IEEE1394 6M/6M, 3 m (9.9 ft)
36005 FireWire cable IEEE1394 6M/6M, 5 m (16.4 ft)
36010 FireWire cable IEEE1394 6M/6M, 10 m (32.8 ft)
FireWire cable for the HDSP system, both sides 6-pin male. Cable longer than 16 ft is not allowed
for FireWire, therefore hard to get in computer shops. However the HDSP system does
not use FireWire protocol, therefore can operate flawlessly even with a cable length of up to 50ft
(15 m).
36003 Optical cable, TOSLINK, 0.5 m (1.6 ft)
36004 Optical cable, TOSLINK, 1 m (3.3 ft)
36006 Optical cable, TOSLINK, 2 m (6.6 ft)
36007 Optical cable, TOSLINK, 3 m (9.9 ft)
36008 Optical cable, TOSLINK, 5 m (16.4 ft)
36009 Optical cable, TOSLINK, 10 m (33 ft)
Standard lightpipe with TOSLINK connectors, RME approved quality.
37011 Power supply for HDSP CardBus card
Robust and light-weigth switching power supply, 100V-240V AC, 12V 1.25 A DC.
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33. Warranty
Each individual Hammerfall DSP undergoes comprehensive quality control and a complete test
at IMM before shipping. The usage of high grade components should guarantee a long and
trouble-free operation of the unit.
If you suspect that your product is faulty, please contact your local retailer.
Audio AG grants a limited manufacturer warranty of 6 months from the day of invoice showing
the date of sale. The length of the warranty period is different per country. Please contact your
local distributor for extended warranty information and service. Note that each country may
have regional specific warranty implications.
In any case warranty does not cover damage caused by improper installation or maltreatment -
replacement or repair in such cases can only be carried out at the owner's expense.
No warranty service is provided when the product is not returned to the local distributor in the
region where the product had been originally shipped.
Audio AG does not accept claims for damages of any kind, especially consequential damage.
Liability is limited to the value of the Hammerfall DSP. The general terms of business drawn up
by Audio AG apply at all times.
34. Appendix
RME news, driver updates and further product information are available on our website:
http://www.rme-audio.com
Manufacturer:
IMM Elektronik GmbH, Leipziger Strasse 32, D-09648 Mittweida
Trademarks
All trademarks, registered or otherwise, are the property of their respective owners. RME,
DIGI96, SyncAlign, ZLM, SyncCheck, DIGICheck and Hammerfall are registered trademarks of
RME Intelligent Audio Solutions. Multiface, TMS and TotalMix are trademarks of RME Intelligent
Audio Solutions. Alesis and ADAT are registered trademarks of Alesis Corp. ADAT optical is a
trademark of Alesis Corp. Microsoft, Windows 2000 and Windows XP are registered trademarks
or trademarks of Microsoft Corp. Steinberg, Cubase and VST are registered trademarks of
Steinberg Media Technologies GmbH. ASIO is a trademark of Steinberg Media Technologies
GmbH.
Copyright © Matthias Carstens, 02/2012. Version 4.0
Current driver version: W2k/XP: 3.27, Mac OS X Intel: 3.01
Although the contents of this User’s Guide have been thoroughly checked for errors, RME can not guarantee that it is
correct throughout. RME does not accept responsibility for any misleading or incorrect information within this guide.
Lending or copying any part of the guide or the RME Driver CD, or any commercial exploitation of these media without
express written permission from RME Intelligent Audio Solutions is prohibited. RME reserves the right to change specifications
at any time without notice.
User's Guide HDSP System Multiface II © RME 79

35. Declaration of Conformity
CE / FCC Compliance
CE
This device has been tested and found to comply with the limits of the European Council Directive
on the approximation of the laws of the member states relating to electromagnetic compatibility
according to RL2004/108/EG, and European Low Voltage Directive RL2006/95/EG.
FCC
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
RoHS
This product has been soldered lead-free and fulfils the requirements of the RoHS directive.
ISO 9001
This product has been manufactured under ISO 9001 quality management. The manufacturer,
IMM Elektronik GmbH, is also certified for ISO 14001 (Environment) and ISO 13485 (medical
devices).
Note on Disposal
According to the guide line RL2002/96/EG (WEEE – Directive on Waste
Electrical and Electronic Equipment), valid for all european countries, this
product has to be recycled at the end of its lifetime.
In case a disposal of electronic waste is not possible, the recycling can
also be done by IMM Elektronik GmbH, the manufacturer of the Multiface.
For this the device has to be sent free to the door to:
80
IMM Elektronik GmbH
Leipziger Straße 32
D-09648 Mittweida
Germany
Shipments not prepaid will be rejected and returned on the original sender's costs.
User's Guide HDSP System Multiface II © RME